6545 Leitus

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6545 Leitus
Discovery [1]
Discovered by M. Antal
Discovery site Piwnice Obs.
Discovery date5 October 1986
Designations
(6545) Leitus
Named after
Leitus
(Greek mythology) [1] [2]
1986 TR6 ·1989 EY4
Jupiter trojan [1] [3]
Greek [4]  · background [5]
Adjectives Leitian
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 29.75 yr (10,867 d)
Aphelion 5.4068 AU
Perihelion 4.8876 AU
5.1472 AU
Eccentricity 0.0504
11.68 yr (4,265 d)
240.78°
0° 5m 3.84s / day
Inclination 11.988°
278.02°
148.94°
Jupiter  MOID 0.1462 AU
TJupiter 2.9540
Physical characteristics
Mean diameter
50.95±0.57  km [6]
56.96±6.8 km [7]
16.26±0.01  h [8] [lower-alpha 1]
0.0545±0.016 [7]
0.068±0.009 [6]
D (Pan-STARRS) [9] [10]
D (SDSS-MOC) [11]
B–V = 0.734±0.041 [12]
V–R = 0.499±0.042 [12]
V–I = 0.910±0.064 [9]
10.0 [6]
10.1 [1] [3] [9]
10.26±0.25 [10]

    6545 Leitus, provisional designation:1986 TR6, is a Jupiter trojan from the Greek camp, approximately 53 kilometers (33 miles) in diameter. It was discovered on 5 October 1986, by Slovak astronomer Milan Antal at the Piwnice Astronomical Observatory in Poland. [1] The dark D-type asteroid has a rotation period of 16.3 hours and belongs to the 90 largest Jupiter trojans. [9] Numbered in 1995, it was named in 2021, after the Argonaut Leitus from Greek mythology, who fought in the Trojan War. [13]

    Contents

    Orbit and classification

    Leitus is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). [4] It is also a non-family asteroid in the Jovian background population. [5] It orbits the Sun at a distance of 4.9–5.4  AU once every 11 years and 8 months (4,265 days; semi-major axis of 5.15 AU). Its orbit has an eccentricity of 0.05 and an inclination of 12° with respect to the ecliptic. [3] The body's observation arc begins with its official discovery observation at Piwnice in October 1986. [1]

    Numbering and naming

    This minor planet was numbered on 9 September 1995 ( M.P.C. 25628). [13] On 29 November 2021, IAU's Working Group for Small Bodies Nomenclature named it after the Argonaut Leitus from Greek mythology. He was one of the seven Achaean Leaders in front of whom Poseidon appeared during the Trojans' attack on the Achaean ships, urging them to fight back instead of acting like cowards. Wounded by Hector, Leitus was one of the few to safely return home after the Trojan War. [1] [2]

    Physical characteristics

    In the SDSS-based taxonomy, Leitus is dark D-type asteroid, [7] [11] which agrees with the determined spectral type by Pan-STARRS. [9] [10] Its V–I color index of 0.91 is typical for most larger Jupiter trojans (also see table below). [9]

    Rotation period

    In March 2013, a rotational lightcurve of Leitus was obtained from photometric observations by Robert Stephens at the Center for Solar System Studies in Landers, California. Lightcurve analysis gave a rotation period of 16.26±0.01 hours with a brightness amplitude of 0.31 magnitude ( U=2+ ). [8] [9] [lower-alpha 1]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer and the Infrared Astronomical Satellite IRAS, Leitus measures 50.95 and 56.96 kilometers in diameter and its surface has an albedo of 0.068 and 0.0545, respectively. [6] [7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 53.16 kilometers based on an absolute magnitude of 10.1. [9]

    100+ largest Jupiter trojans
    Largest Jupiter Trojans by survey(A)
    (mean-diameter in kilometers; YoD: Year of Discovery)
    Designation H WISE IRAS Akari Ln RP V–I YoDRef
    624 Hektor 7.2225233230.99L46.920.9301907 list
    617 Patroclus 8.19140.362140.92140.85L5102.800.8301906 list
    911 Agamemnon 7.89131.038166.66185.30L46.590.9801919 list
    588 Achilles 8.67130.099135.47133.22L47.310.9401906 list
    3451 Mentor 8.4126.288116.30117.91L57.700.7701984 list
    3317 Paris 8.3118.790116.26120.45L57.090.9501984 list
    1867 Deiphobus 8.3118.220122.67131.31L558.660.9301971 list
    1172 Äneas 8.33118.020142.82148.66L58.710.9501930 list
    1437 Diomedes 8.3117.786164.31172.60L424.490.8101937 list
    1143 Odysseus 7.93114.624125.64130.81L410.110.8601930 list
    2241 Alcathous 8.64113.682114.63118.87L57.690.9401979 list
    659 Nestor 8.99112.320108.87107.06L415.980.7901908 list
    3793 Leonteus 8.7112.04686.2687.58L45.620.7801985 list
    3063 Makhaon 8.4111.655116.14114.34L48.640.8301983 list
    1583 Antilochus 8.6108.842101.62111.69L431.540.9501950 list
    884 Priamus 8.81101.09396.29119.99L56.860.9001917 list
    1208 Troilus 8.99100.477103.34111.36L556.170.7401931 list
    1173 Anchises 8.8999.549126.27120.49L511.600.7801930 list
    2207 Antenor 8.8997.65885.1191.32L57.970.9501977 list
    2363 Cebriones 9.1195.97681.8484.61L520.050.9101977 list
    4063 Euforbo 8.795.619102.46106.38L48.850.9501989 list
    2357 Phereclos 8.9494.62594.9098.45L514.390.9601981 list
    4709 Ennomos 8.591.43380.8580.03L512.280.6901988 list
    2797 Teucer 8.789.430111.14113.99L410.150.9201981 list
    2920 Automedon 8.888.574111.01113.11L410.210.9501981 list
    15436 Dexius 9.187.64685.7178.63L48.970.8701998 list
    3596 Meriones 9.287.38075.0973.28L412.960.8301985 list
    2893 Peiroos 9.2386.88487.4686.76L58.960.9501975 list
    4086 Podalirius 9.185.49586.8985.98L410.430.8701985 list
    4060 Deipylos 9.384.04379.2186.79L49.300.7601987 list
    1404 Ajax 9.383.99081.6996.34L429.380.9601936 list
    4348 Poulydamas 9.582.03270.0887.51L59.910.8401988 list
    5144 Achates 9.080.95891.9189.85L55.960.9201991 list
    4833 Meges 8.980.16587.3389.39L414.250.9401989 list
    2223 Sarpedon 9.4177.48094.63108.21L522.740.8801977 list
    4489 Dracius 9.076.59592.9395.02L412.580.9501988 list
    2260 Neoptolemus 9.3176.43571.6581.28L48.180.9501975 list
    5254 Ulysses 9.276.14778.3480.00L428.720.9701986 list
    3708 Socus 9.375.66179.5976.75L56.550.9801974 list
    2674 Pandarus 9.174.26798.10101.72L58.481.0001982 list
    3564 Talthybius 9.473.73068.9274.11L440.590.9001985 list
    4834 Thoas 9.172.33186.8296.21L418.190.9501989 list
    7641 Cteatus 9.471.83968.9775.28L427.770.9801986 list
    3540 Protesilaos 9.370.22576.8487.66L48.950.9401973 list
    11395 Iphinous 9.868.97764.7167.78L417.381998 list
    4035 Thestor 9.668.73368.2366.99L413.470.9701986 list
    5264 Telephus 9.468.47273.2681.38L49.530.9701991 list
    1868 Thersites 9.568.16370.0878.89L410.480.9601960 list
    9799 Thronium 9.668.03364.8772.42L421.520.9101996 list
    4068 Menestheus 9.567.62562.3768.46L414.400.9501973 list
    23135 Pheidas 9.966.23058.2968.50L48.690.8602000 list
    2456 Palamedes 9.365.91691.6699.60L47.240.9201966 list
    3709 Polypoites 9.165.29799.0985.23L410.041.0001985 list
    1749 Telamon 9.564.89881.0669.14L416.980.9701949 list
    3548 Eurybates 9.663.88572.1468.40L48.710.7301973 list
    4543 Phoinix 9.763.83662.7969.54L438.871.2001989 list
    12444 Prothoon 9.863.83564.3162.41L515.821996 list
    4836 Medon 9.563.27767.7378.70L49.820.9201989 list
    16070 Charops 9.763.19164.1368.98L520.240.9601999 list
    15440 Eioneus 9.662.51966.4871.88L421.430.9701998 list
    4715 Medesicaste 9.762.09763.9165.93L58.810.8501989 list
    34746 Thoon 9.861.68460.5163.63L519.630.9502001 list
    38050 Bias 9.861.60361.0450.44L418.850.9901998 list
    5130 Ilioneus 9.760.71159.4052.49L514.770.9601989 list
    5027 Androgeos 9.659.78657.86n.a.L411.380.9101988 list
    6090 Aulis 9.459.56874.5381.92L418.480.9801989 list
    5648 Axius 9.759.29563.91n.a.L537.560.9001990 list
    7119 Hiera 9.759.15076.4077.29L44000.9501989 list
    4805 Asteropaios 10.057.64753.1643.44L512.371990 list
    16974 Iphthime 9.857.34155.4357.15L478.90.9601998 list
    4867 Polites 9.857.25158.2964.29L511.241.0101989 list
    2895 Memnon 10.056.70655.67n.a.L57.500.7101981 list
    4708 Polydoros 9.954.96455.67n.a.L57.520.9601988 list
    (21601) 1998 XO89 10.054.90955.6756.08L412.650.9701998 list
    12929 Periboea 9.954.07761.0455.34L59.270.8801999 list
    17492 Hippasos 10.053.97555.67n.a.L517.751991 list
    5652 Amphimachus 10.153.92153.1652.48L48.371.0501992 list
    2759 Idomeneus 9.953.67661.0152.55L432.380.9101980 list
    5258 Rhoeo 10.253.27550.77n.a.L419.851.0101989 list
    (12126) 1999 RM11 10.153.202n.a.n.a.L5n.a. ?1999 list
    (15502) 1999 NV27 10.053.10055.6750.86L515.130.8751999 list
    4754 Panthoos 10.053.02553.1556.96L527.681977 list
    4832 Palinurus 10.052.05853.16n.a.L55.321.0001988 list
    5126 Achaemenides 10.551.92244.2248.57L453.021989 list
    3240 Laocoon 10.251.69550.77n.a.L511.310.8801978 list
    4902 Thessandrus 9.851.26361.0471.79L47380.9601989 list
    11552 Boucolion 10.151.13653.1653.91L532.441993 list
    (20729) 1999 XS143 10.450.96146.30n.a.L45.721.0001999 list
    6545 Leitus 10.150.95153.16n.a.L416.260.9101986 list
    4792 Lykaon 10.150.87053.16n.a.L540.090.9601988 list
    21900 Orus 10.050.81055.6753.87L413.450.9501999 list
    1873 Agenor 10.150.79953.7654.38L520.601971 list
    5028 Halaesus 10.250.77050.77n.a.L424.940.9001988 list
    2146 Stentor 9.950.75558.29n.a.L416.401976 list
    4722 Agelaos 10.050.37853.1659.47L518.440.9101977 list
    5284 Orsilocus 10.150.15953.16n.a.L410.310.9701989 list
    11509 Thersilochos 10.149.96053.1656.23L517.371990 list
    5285 Krethon 10.149.60658.5352.61L412.041.0901989 list
    4791 Iphidamas 10.149.52857.8559.96L59.701.0301988 list
    9023 Mnesthus 10.149.15150.7760.80L530.661988 list
    5283 Pyrrhus 9.748.35664.5869.93L47.320.9501989 list
    4946 Askalaphus 10.248.20952.7166.10L422.730.9401988 list
    (22149) 2000 WD49 10.248.19050.7750.37L47.841.0902000 list
    (32496) 2000 WX182 10.248.01750.7751.63L523.340.9502000 list
    5120 Bitias 10.247.98750.77n.a.L515.210.7801988 list
    12714 Alkimos 10.147.81961.0454.62L428.481991 list
    7352 Hypsenor 9.947.73155.67 47.07L56480.8501994 list
    1870 Glaukos 10.647.64942.23n.a.L55.991971 list
    4138 Kalchas 10.146.46253.1661.04L429.20.8101973 list
    (23958) 1998 VD30 10.246.00150.7747.91L45620.9901998 list
    4828 Misenus 10.445.95446.30 43.22L512.870.9201988 list
    4057 Demophon 10.145.68353.16n.a.L429.821.0601985 list
    4501 Eurypylos 10.445.52446.30n.a.L46.051989 list
    4007 Euryalos 10.345.51548.4853.89L46.391973 list
    5259 Epeigeus 10.344.74142.5944.42L418.421989 list
    30705 Idaios 10.444.54646.30n.a.L515.741977 list
    16560 Daitor 10.743.86151.4243.38L51991 list
    (15977) 1998 MA11 10.443.53046.3051.53L52500.9061998 list
    7543 Prylis 10.642.89342.23n.a.L417.801973 list
    4827 Dares 10.542.77044.22n.a.L519.001988 list
    1647 Menelaus 10.542.71644.22n.a.L417.740.8661957 list
    (A) Used sources: WISE/NEOWISE catalog (NEOWISE_DIAM_V1 PDS, Grav, 2012); IRAS data (SIMPS v.6 catalog); and Akari catalog (Usui, 2011); RP: rotation period and V–I (color index) taken from the LCDB

    Note: missing data was completed with figures from the JPL SBDB (query) and from the LCDB (query form) for the WISE/NEOWISE and SIMPS catalogs, respectively. These figures are given in italics. Also, listing is incomplete above #100.

    Notes

    1. 1 2 Lightcurve plot of (6545) 1986 TR6 from Mar 2013 by Robert Stephens at the Center for Solar System Studies ( U81 ). Quality code is not available (lightcurve rating at CS3). Summary figures at the LCDB and CS3.

    Related Research Articles

    2146 Stentor is a Jupiter trojan from the Greek camp, approximately 51 kilometers in diameter. It was discovered on 24 October 1976, by Danish astronomer Richard Martin West at the ESO's La Silla Observatory in Chile. The dark Jovian asteroid has a rotation period of 16.4 hours and belongs to the 100 largest Jupiter trojans. It was named after Stentor from Greek mythology, a Herald of the Greeks during the Trojan War.

    <span class="mw-page-title-main">3391 Sinon</span>

    3391 Sinon is a mid-sized Jupiter trojan from the Greek camp, approximately 40 kilometers in diameter. It was discovered on 18 February 1977, by Japanese astronomers Hiroki Kosai and Kiichirō Furukawa at the Kiso Observatory in Japan. The dark Jovian asteroid has a rotation period of 8.1 hours and likely an elongated shape. It was named after the hero Sinon from Greek mythology.

    5126 Achaemenides is a Jupiter trojan from the Greek camp, approximately 50 kilometers in diameter. It was discovered on 1 February 1989, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The dark Jovian asteroid belongs the 100 largest Jupiter trojans and has a long rotation period of 32.4 hours. It was named after one of Odysseus's crew members, Achaemenides, from Greek mythology.

    5144 Achates is a large Jupiter trojan from the Trojan camp, approximately 90 kilometers in diameter. It was discovered on 2 December 1991, by American astronomer Carolyn Shoemaker at the Palomar Observatory in southern California, United States. The assumed C-type asteroid has a rotation period of 6 hours, a notably eccentric orbit of 0.27, and belongs to the 40 largest Jupiter trojans. It was named after Achates from Greco-Roman mythology.

    17314 Aisakos is a Jupiter trojan from the Trojan camp, approximately 36 kilometers in diameter. It was discovered at the Palomar Observatory during the first Palomar–Leiden Trojan survey in 1971. The dark Jovian asteroid has a rotation period of 9.7 hours. It was named after the Trojan prince Aesacus from Greek mythology.

    11552 Boucolion is a Jupiter trojan from the Trojan camp, approximately 53 kilometers in diameter. It was discovered on 27 January 1993, by Belgian astronomer Eric Elst at the CERGA Observatory in Caussols, France. The dark D-type asteroid is one of the 90 largest Jupiter trojans and has a long rotation period of 32.4 hours. It was named from Greek mythology after the Boucolion, who lost his sons in the Trojan War.

    '4501 Eurypylos is a Jupiter trojan from the Greek camp, approximately 46 kilometers in diameter. It was discovered on 4 February 1989 by Belgian astronomer Eric Elst at ESO's La Silla Observatory in Chile. The dark Jovian asteroid has a short rotation period of 6.1 hours. It was named after the Thessalian king Eurypylus from Greek mythology.

    4791 Iphidamas is a Jupiter trojan from the Trojan camp, approximately 58 kilometers in diameter. It was discovered on 14 August 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The dark Jovian asteroid belongs the 100 largest Jupiter trojans and has a rotation period of 9.7 hours. It was named after the Trojan warrior Iphidamas, from Greek mythology.

    2895 Memnon is a dark Jupiter trojan from the Trojan camp, approximately 56 kilometers in diameter. It was discovered on 10 January 1981, by American astronomer Norman Thomas at Lowell's Anderson Mesa Station near Flagstaff, Arizona, in the United States. The assumed C-type asteroid has a rotation period of 7.5 hours and belongs to the 80 largest Jupiter trojans. It was named after King Memnon from Greek mythology.

    9023 Mnesthus is a large Jupiter trojan from the Trojan camp, approximately 50 kilometers in diameter. It was discovered on 10 September 1988, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California. The dark Jovian asteroid belongs to the 100 largest Jupiter trojans and has a longer-than-average rotation period of 30.7 hours. It was named after the Trojan Mnestheus, a companion of Aeneas in Classical mythology.

    5284 Orsilocus is a Jupiter trojan from the Greek camp, approximately 50 kilometers in diameter. It was discovered on 1 February 1989, by American astronomers Carolyn and Eugene Shoemaker at the Palomar Observatory in California. The D-type asteroid belongs the 100 largest Jupiter trojans and has a rotation period of 10.3 hours. It was named after the hero Orsilochus (Orsilocus) from Greek mythology.

    4832 Palinurus is a Jupiter trojan from the Trojan camp, approximately 52 kilometers in diameter. It was discovered on 12 October 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The dark D-type asteroid belongs to the 90 largest Jupiter trojans and has a short rotation period of 5.3 hours. It was named after Aeneas' navigator, Palinurus, from Greek mythology.

    4708 Polydoros is a Jupiter trojan from the Trojan camp, approximately 55 kilometers in diameter. It was discovered on 11 September 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The D-type asteroid belongs to the 80 largest Jupiter trojans and has a rotation period of 7.5 hours. It was named after the Trojan prince Polydorus, from Greek mythology.

    4348 Poulydamas is a large Jupiter Trojan from the Trojan camp, approximately 82 kilometers in diameter. It was discovered on 11 September 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The assumed C-type asteroid belongs to the 40 largest Jupiter trojans and has a rotation period of 9.9 hours. It was named after Poulydamas from Greek mythology.

    <span class="mw-page-title-main">5025 Mecisteus</span> Asteroid in the orbit of Jupiter

    5025 Mecisteus, provisional designation:1986 TS6, is a larger Jupiter trojan from the Greek camp, approximately 50 kilometers (31 miles) in diameter. The unusual C/X-type Jovian asteroid is possibly a slow rotator with a rotation period of 250 hours. It was discovered on 5 October 1986 by Slovak astronomer Milan Antal at the Toruń Centre for Astronomy in Piwnice, Poland. In 2021, it was named from Greek mythology after the Greek hero Mecisteus who fought in the Trojan War.

    18493 Demoleon is a Jupiter trojan from the Trojan camp, approximately 33 kilometers in diameter. It was discovered by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile on 17 April 1996. The dark Jovian asteroid has a rotation period of 14.4 hours. It was named after the Trojan warrior Demoleon from Greek mythology.

    7352 Hypsenor, provisional designation:1994 CO, is a larger Jupiter trojan from the Trojan camp, approximately 48 kilometers in diameter. The tumbling Jovian asteroid is a slow rotator with an exceptionally long rotation period of 648 hours. It was discovered on 4 February 1994 by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at the Kushiro Observatory on Hokkaidō, Japan. It was numbered in December 1996, and named after the Trojan warrior Hypsenor from Greek mythology in November 2021.

    7641 Cteatus, provisional designation: 1986 TT6, is a large Jupiter trojan from the Greek camp, approximately 70 kilometers (43 miles) in diameter. It was discovered on 5 October 1986, by Slovak astronomer Milan Antal at the Toruń Centre for Astronomy in Piwnice, Poland. The dark D-type asteroid is notably inclined and has longer-than-average rotation period of 27.8 hours. It belongs to the 50 largest Jupiter trojans. It was named from Greek mythology for Cteatus, the conjoined twin and father of Amphimachus.

    30942 Helicaon is a Jupiter trojan from the Trojan camp, approximately 33 kilometers in diameter. It was discovered on 8 February 1994, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile. The dark Jovian asteroid has a long rotation period of 44.8 hours. It was named after the Trojan warrior Helicaon from Greek mythology.

    (21601) 1998 XO89, provisional designation:1998 XO89, is a Jupiter trojan from the Greek camp, approximately 55 kilometers (34 miles) in diameter. It was discovered on 15 December 1998, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico. The dark Jovian asteroid has a rotation period of 12.7 hours and belongs to the 80 largest Jupiter trojans. It has not been named since its numbering in February 2001.

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