(163348) 2002 NN4

Last updated
(163348) 2002 NN4
Orbit diagram of (163348) 2002 NN4.png
2002 NN4 orbits between Venus and Mars
Discovery [1]
Discovered by LINEAR
Discovery site Lincoln Lab's ETS
Discovery date9 July 2002
Designations
(163348) 2002 NN4
2002 NN4
NEO  · PHA  · Aten [1] [2]
Orbital characteristics [2]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0 [2]  ·2 [1]
Observation arc 14.16 yr (5,171 d)
Aphelion 1.2572 AU
Perihelion 0.4956 AU
0.8764 AU
Eccentricity 0.4345
300 days
83.774°
1° 12m 4.68s / day
Inclination 5.4177°
259.48°
222.23°
Earth  MOID 0.0069  AU (2.69  LD)
Physical characteristics
Mean diameter
14.50±0.03  h [5] [lower-alpha 1]
X [3]
20.1 [1] [2] [4]

    (163348) 2002 NN4 ( prov. designation:2002 NN4) is a dark, sub-kilometer near-Earth object and potentially hazardous asteroid of the Aten group that flew by Earth on 6 June 2020. The highly elongated X-type asteroid has a rotation period of 14.5 hours and measures approximately 0.7 kilometers (0.4 miles) in diameter. [2] [6] It was discovered by LINEAR at the Lincoln Laboratory's Experimental Test Site in New Mexico on 9 July 2002. [1]

    Contents

    Orbit

    2002 NN4 flew by Earth on 6 June 2020, passing 0.034  AU (5.1 million  km ; 13  LD ) from Earth. [2] The asteroid had been recovered two days earlier on 4 June 2020. [1] By 11 June 2020, the asteroid had brightened to apparent magnitude 14.4, which is roughly the brightness of Pluto.

    Being a member of the Aten asteroids, 2002 NN4 orbits the Sun at a distance of 0.50–1.26  AU once every 10 months (300 days; semi-major axis of 0.88 AU). Its orbit has an eccentricity of 0.43 and an inclination of 5° with respect to the ecliptic. [2] It was first observed by the Near-Earth Asteroid Tracking on Palomar Observatory on 2 July 2002, or seven nights prior to its official discovery observation by LINEAR. [1] This asteroid has an Earth minimum orbit intersection distance of 0.0069 AU (1,030,000 km), which corresponds to 2.7 lunar distances (LD). [2]

    Physical characteristics

    A spectroscopic survey of the small near-Earth asteroid population conducted by European astronomers determined that 2002 NN4 is an X-type asteroid. [3] [6] Because of the objects low albedo (see below), it would be considered a primitive P-type asteroid in the Tholen classification.

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 2002 NN4 measures (735±243) meters in diameter, and its surface has a dark albedo of (0.030±0.027). [4] (The NEOWISE publication uses the designation G3348 for this asteroid. [7] ) In 2016, astronomers using the European New Technology Telescope at La Silla Observatory found a diameter of 613 meters with an albedo of 0.047. [3] : 4 

    Rotation period

    In August 2016, the first rotational lightcurve of 2002 NN4 was obtained from photometric observations over five nights by Brian Warner at the Center for Solar System Studies ( U82 ) in California. Lightcurve analysis gave a rotation period of 14.50±0.03 hours with a high brightness variation of 0.74±0.05 magnitude, indicative of a highly elongated shape ( U=3− ). [5] [lower-alpha 1]

    Notes

    1. 1 2 Lightcurve plot of (163348) 2002 NN4, by Brian Warner at the Center for Solar System Studies (2016). Rotation period of 14.50±0.03 hours with a brightness amplitude of 0.74±0.05 mag. Quality code is 3−. Summary figures at the LCDB and CS3 websites.

    Related Research Articles

    <span class="mw-page-title-main">4183 Cuno</span> Asteroid

    4183 Cuno, provisional designation 1959 LM, is an eccentric, rare-type asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, and measures approximately 4 kilometers in diameter.

    <span class="mw-page-title-main">2062 Aten</span> Sub-kilometer asteroid

    2062 Aten, provisional designation 1976 AA, is a stony sub-kilometer asteroid and namesake of the Aten asteroids, a subgroup of near-Earth objects. The asteroid was named after Aten from Egyptian mythology.

    2340 Hathor, provisional designation 1976 UA, is an eccentric stony asteroid, classified as near-Earth object and potentially hazardous asteroid. It belongs to the Aten group of asteroids and measures approximately 210 meters in diameter. Discovered by Charles Kowal in 1976, it was later named after the ancient Egyptian goddess Hathor.

    (12538) 1998 OH is a stony asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.8 kilometers in diameter. It was discovered on 19 July 1998, by astronomers of the Near-Earth Asteroid Tracking program at the Haleakala Observatory in Hawaii, United States. In 2019, the asteroid came within about 73 lunar distances of Earth.

    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.

    4401 Aditi, provisional designation 1985 TB, is an eccentric, stony asteroid, classified as a near-Earth object and Amor asteroid, approximately 1.8 kilometers in diameter. It was discovered on 14 October 1985 by American astronomer Carolyn Shoemaker at Palomar Observatory in California, and later named after the Hindu goddess Aditi.

    3800 Karayusuf, provisional designation 1984 AB, is a Mars-crossing asteroid and suspected binary system from inside the asteroid belt, approximately 2.5 kilometers in diameter. It was discovered on 4 January 1984, by American astronomer Eleanor Helin at the Palomar Observatory in California. The S/L-type asteroid has a short rotation period of 2.2 hours. It was named after Syrian physician Alford Karayusuf, a friend of the discoverer.

    1355 Magoeba, provisional designation 1935 HE, is a Hungaria asteroid and a suspected contact-binary from the innermost regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 30 April 1935, by English-born, South African astronomer Cyril Jackson at the Johannesburg Observatory in South Africa. The asteroid is named for Magoeba, a tribal chief in the South African Transvaal Province.

    <span class="mw-page-title-main">4489 Dracius</span> Jupiter trojan (asteroid)

    4489 Dracius,, is a large Jupiter trojan from the Greek camp, approximately 90 kilometers in diameter. It was discovered on 15 January 1988, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory near Flagstaff, Arizona, in the United States. The dark D-type asteroid belongs to the 50 largest Jupiter trojans and has a rotation period of 12.58 hours. It was named after Dracius from Greek mythology, who was a commander of the Epeans who fought against Hector.

    (6382) 1988 EL, is a stony Hungaria asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 14 March 1988, by American astronomer Jeffrey Alu at the U.S. Palomar Observatory, California.

    (467336) 2002 LT38, is a sub-kilometer asteroid and suspected tumbler, classified as a near-Earth object and potentially hazardous asteroid of the Aten group, approximately 240 meters (790 ft) in diameter. It was discovered on 12 June 2002, by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States.

    20936 Nemrut Dagi, provisional designation: 4835 T-1, is a stony Hungaria asteroid and Mars-grazer from the innermost regions of the asteroid belt, approximately 3.5 kilometers in diameter. It was discovered on 13 May 1971, by Dutch astronomer couple Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Dutch–American astronomer Tom Gehrels at Palomar Observatory in California, United States. The asteroid has a rotation period of 3.28 hours, a likely spheroidal shape, and a high albedo typically seen among the enstatite-rich E-type asteroids. In 2012, it was named after the a dormant volcano Nemrut in Turkey.

    <span class="nowrap">(190166) 2005 UP<sub>156</sub></span>

    (190166) 2005 UP156 is a stony asteroid and binary system, classified as near-Earth object of the Apollo group, approximately 1 kilometer in diameter. It was discovered on 31 October 2005, by astronomers of the Spacewatch survey at the Kitt Peak National Observatory in Arizona, United States. Its minor-planet moon with an orbital period of 40.25 hours was discovered in 2017.

    (90075) 2002 VU94, provisional designation 2002 VU94, is an asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 2.5 kilometers in diameter. It was discovered on 13 November 2002, by astronomers of the Near-Earth Asteroid Tracking program at Palomar Observatory in California, United States. It is one of the largest potentially hazardous asteroids known.

    (159857) 2004 LJ1, provisional designation 2004 LJ1, is an asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 3 kilometers in diameter. The asteroid was discovered on 10 June 2004, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. It is one of the largest potentially hazardous asteroids known to exist.

    (85713) 1998 SS49, provisional designation 1998 SS49, is an asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 3 kilometers (1.9 miles) in diameter. The asteroid was discovered on 29 September 1998, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. It is one of the largest potentially hazardous asteroids and has a notably low Earth-MOID of less than the distance to the Moon.

    (163243) 2002 FB3, provisional designation 2002 FB3, is a stony asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Athen group, approximately 1.6 kilometers (1 mile) in diameter. It was discovered on 18 March 2002, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The Q-type asteroid has a rotation period of 6.2 hours.

    (385343) 2002 LV, provisional designation 2002 LV, is a stony asteroid on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.5 kilometers in diameter. It was discovered on 1 June 2002, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The Sr-type asteroid has a rotation period of 6.2 hours and is likely elongated.

    (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.

    (172034) 2001 WR1, provisional designation: 2001 WR1, is a sub-kilometer near-Earth object of the Amor group, approximately 650 meters (2,100 feet) in diameter. The S-type asteroid has been identified as a potential flyby target of the Hayabusa2 mission. It was discovered on 17 November 2001, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The asteroid has a rotation period of 8.0 hours and possibly an elongated shape. It remains unnamed since its numbering in December 2007.

    References

    1. 1 2 3 4 5 6 7 "163348 (2002 NN4)". Minor Planet Center. Retrieved 8 June 2020.
    2. 1 2 3 4 5 6 7 8 "JPL Small-Body Database Browser: 163348 (2002 NN4)" (2016-08-28 last obs.). Jet Propulsion Laboratory . Retrieved 8 June 2020.
    3. 1 2 3 4 5 Perna, D.; Barucci, M. A.; Fulchignoni, M.; Popescu, M.; Belskaya, I.; Fornasier, S.; et al. (August 2018). "A spectroscopic survey of the small near-Earth asteroid population: Peculiar taxonomic distribution and phase reddening". Planetary and Space Science. 157: 82–95. arXiv: 1803.08953 . Bibcode:2018P&SS..157...82P. doi:10.1016/j.pss.2018.03.008. ISSN   0032-0633. S2CID   119426280.
    4. 1 2 3 4 Masiero, Joseph R.; Nugent, C.; Mainzer, A. K.; Wright, E. L.; Bauer, J. M.; Cutri, R. M.; et al. (October 2017). "NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos". The Astronomical Journal. 154 (4): 10. arXiv: 1708.09504 . Bibcode:2017AJ....154..168M. doi: 10.3847/1538-3881/aa89ec . S2CID   45334910.
    5. 1 2 Warner, Brian D. (January 2017). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 July-September" (PDF). Minor Planet Bulletin. 44 (1): 22–36. Bibcode:2017MPBu...44...22W. ISSN   1052-8091. PMC   7243971 . PMID   32455389.
    6. 1 2 "LCDB Data for (163348) 2002 NN4". Asteroid Lightcurve Database (LCDB). Retrieved 8 June 2020.
    7. ↑ Plait, Phil (4 June 2020). "No, we're not in any danger from an asteroid passing Earth on Saturday night". Bad Astronomy. Retrieved 9 June 2020. (Neowise Table)
    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.