5905 Johnson

Last updated

5905 Johnson
Discovery  [1]
Discovered by E. F. Helin
Discovery site Palomar Obs.
Discovery date11 February 1989
Designations
(5905) Johnson
Named after
Lindley N. Johnson
(astronomer, engineer) [2]
1989 CJ1
main-belt  ·(inner)  [1]
Hungaria   [3] [4]  · background   [5]
Orbital characteristics   [1]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 28.96 yr (10,576 days)
Aphelion 2.0476 AU
Perihelion 1.7727 AU
1.9102 AU
Eccentricity 0.0720
2.64 yr (964 days)
174.14°
0° 22m 23.88s / day
Inclination 27.521°
141.28°
208.81°
Known satellites 1 (P: 21.78 h; 0.4 Ds/Dp) [6] [lower-alpha 1]
Physical characteristics
Mean diameter
3.62±0.67 km [7]
3.85±0.66 km [8]
4.1±0.5 km [9]
4.728±0.064 km [10]
4.791±0.065 km [11]
4.797 km [12]
4.80 km (taken) [4]
3.78142±0.0002 h [lower-alpha 2]
3.78222±0.0001 h [13]
3.7823±0.0002 h [14]
3.7824±0.0001 h [6]
3.7827±0.0002 h [15] [lower-alpha 3]
0.1524 [12]
0.1939±0.0278 [11]
0.198±0.022 [10]
0.25±0.10 [8]
0.266±0.100 [9]
0.44±0.17 [7]
S (assumed) [4]
13.6±0.3(R) [13]  ·14.0 [1] [7] [11] [15]  ·14.00±0.1 [9]  ·14.15±0.92 [16]  ·14.21 [8]  ·14.255±0.13 [4] [12]

    5905 Johnson, provisional designation 1989 CJ1, is a Hungaria asteroid and synchronous binary system [lower-alpha 1] from the innermost regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 11 February 1989, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. [3] Its satellite measures approximately 1.6 km (1 mi) in diameter and orbits its primary every 21.8 hours. [6] It was named after American astronomer and engineer Lindley N. Johnson. [2]

    Contents

    Classification and orbit

    Johnson is a stony S-type asteroid and member of the dynamical Hungaria group, which forms the innermost dense concentration of asteroids in the Solar System. [3] [4] It is, however, not a member of collisional Hungaria family, but a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [5]

    It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.0  AU once every 2 years and 8 months (964 days; semi-major axis of 1.91 AU). Its orbit has an eccentricity of 0.07 and an inclination of 28° with respect to the ecliptic. [1] As no precoveries were taken, and no prior identifications were made, the body's observation arc begins at Palomar with its official discovery observation in February 1989. [3]

    Diameter and albedo

    According to the surveys carried out by NASA's space-based Spitzer and WISE telescopes, and the NEOWISE mission, Johnson measures between 3.62 and 4.791 kilometers in diameter, and its surface has an albedo between 0.19 and 0.44. [7] [8] [9] [10] [11] The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE-data, that is, an albedo of 0.1524 and a diameter of 4.80 kilometers for an absolute magnitude of 14.255. [4]

    Moon and lightcurves

    Between 1 and 11 April 2005, the first ever rotational lightcurve was obtained from photometric observations taken by astronomers Brian Warner at the Palmer Divide Observatory, Colorado, by Petr Pravec and Peter Kušnirák at Ondřejov Observatory, Czech Republic, by Adrián Galád and Štefan Gajdoš at Modra Observatory, Slovakia, and by P. Brown and Z. Krzeminski of the Department of Physics and Astronomy at UWO in Ontario, Canada. [6] [lower-alpha 1]

    These observations revealed, that Johnson is a synchronous binary asteroid with a moon orbiting its primary every 21.785 hours. The observed mutual asteroid occultation and eclipsing events had a magnitude of between 0.15 and 0.18 magnitude, suggesting that the satellite's diameter measures 40% of that of Johnson (a secondary-to-primary diameter ratio of 0.4), which translates into a mean-diameter of 1.4–1.9 kilometer. [6] [lower-alpha 1]

    Since Johnson's first observation in April 2005, astronomer Brian Warner and Petr Pravec have obtained additional lightcurves. [lower-alpha 4] [lower-alpha 3] They gave a revised rotation period for the primary of 3.7814 to 3.7824 hours with a brightness variation between 0.10 and 0.20 magnitude ( U=3/3/3/3/3 ). These observations also confirmed that Johnson is a binary system, giving a concurring orbital period of 21.78 to 21.797 hours for the satellite. [13] [14] [15] [lower-alpha 2] For an asteroid of its size, Johnson has a somewhat fast spin rate, but still significantly above those of fast rotators. CALL adopts a rotation period of 3.7824 hours with an amplitude of 0.20 magnitude. [4]

    Naming

    This minor planet was named after American astronomer and engineer Lindley N. Johnson at NASA's Jet Propulsion Laboratory. A space enthusiast since the age of 12, Johnson has been instrumental for the Near-Earth Asteroid Tracking program, which became operational at GEODSS on Hawaii (Haleakala-NEAT; 566) in December 1995. [2] The approved naming citation was published by the Minor Planet Center on 3 May 1996 ( M.P.C. 27128). [17]

    Notes

    1. 1 2 3 4 Central Bureau for Astronomical Telegrams – IAUC 8511
      Photometric observations obtained between 1 and 11 April 2005, reveal, that 5905 Johnson is a binary system with an orbital period of 21.78 hours. The primary rotates with a period of 3.783 hours. The lightcurve's amplitude of 0.11 magnitude suggests a nearly spheroidal shape. Mutual eclipse and occultation events between 0.15 and 0.18 magnitude, suggest a secondary-to-primary mean-diameter ratio of 0.4. The system's mean absolute R magnitude is 12.8±0.1.
      Reported by: Brian Warner (Palmer Divide Obs.) Petr Pravec and Peter Kušnirák (Ondřejov Obs., Czech Republic) Donald P. Pray (Carbuncle Hill Obs.); Adrián Galád and Štefan Gajdoš (Modra Obs., Slovakia) and P. Brown and Z. Krzeminski, Department of Physics and Astronomy, University of Western Ontario
    2. 1 2 Pravec (2011) web: rotational lightcurves with a rotation period of 3.7814±0.0002, 3.7814±0.0001 and 3.78142±0.00005 hours, respectively. Brightness amplitude varies between 0.18 and 0.20 mag. Summary figures at Collaborative Asteroid Lightcurve Link and Ondrejov Asteroid Photometry Project
    3. 1 2 Lightcurve plot of (5905) Johnson, with a rotation period of 3.7834 hours from the Palmer Divide Observatory, B. D. Warner (2008). Summary figures at LCDB
    4. ↑ List of 8 lightcurve plots of (5905) Johnson:  a  · b  · c  · d  · e  · f  · g  · h. Source: unpublished periods of asteroids at the Ondrejov NEO Photometric Program

    Related Research Articles

    9617 Grahamchapman, provisional designation 1993 FA5, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 2.8 kilometers in diameter.

    3309 Brorfelde, provisional designation 1982 BH, is a nearly spheroidal, binary Hungaria asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 28 January 1982, by Danish astronomers Kaare Jensen and Karl Augustesen at the Brorfelde Observatory near Holbæk, Denmark. It was named for the discovering observatory and the village where it is located.

    4674 Pauling, provisional designation 1989 JC, is a spheroidal binary Hungaria asteroid from the innermost regions of the asteroid belt, approximately 4.5 kilometers in diameter. It was discovered by American astronomer Eleanor Helin at the U.S. Palomar Observatory, California, on 2 May 1989, and named after the American chemist and Nobel laureate Linus Pauling.

    1065 Amundsenia, provisional designation 1926 PD, is a stony asteroid and sizeable Mars-crosser on an eccentric orbit from the inner asteroid belt, approximately 10 kilometers in diameter. It was discovered on 4 August 1926, by Soviet astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Norwegian polar explorer Roald Amundsen.

    3673 Levy, provisional designation 1985 QS, is a binary Flora asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 22 August 1985, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, United States. The asteroid was named after Canadian astronomer David H. Levy.

    <span class="mw-page-title-main">1126 Otero</span>

    1126 Otero, provisional designation 1929 AC, is a rare-type Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 11 January 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. It was named after Spanish courtesan Carolina Otero.

    (9992) 1997 TG19 is a stony asteroid and eccentric Mars-crosser, approximately 4 kilometers in diameter. It was discovered on 8 October 1997, by Japanese astronomers Tetsuo Kagawa and Takeshi Urata at Gekko Observatory near Shizuoka, Japan.

    6084 Bascom, provisional designation 1985 CT, is a binary Phocaea asteroid from the inner regions of the asteroid belt, approximately 6.3 kilometers in diameter. It was discovered on 12 February 1985, by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory in California. It is named after American geologist Florence Bascom. Its satellite measures approximately 2.3 kilometers and has an orbital period of 43.51 hours.

    4029 Bridges, provisional designation 1982 KC1, is a stony asteroid and binary system from the middle regions of the asteroid belt, approximately 8 kilometers in diameter.

    29292 Conniewalker, provisional designation 1993 KZ1, is a bright, stony Phocaea asteroid and slow tumbler from the inner regions of the asteroid belt, approximately 4.6 kilometers in diameter. It was discovered on 24 May 1993, by American astronomer Carolyn Shoemaker and Canadian astronomer David Levy at the Palomar Observatory in California, United States.

    <span class="mw-page-title-main">1338 Duponta</span>

    1338 Duponta, provisional designation 1934 XA, is a stony Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter.

    4951 Iwamoto, provisional designation 1990 BM, is a stony, synchronous binary asteroid and slow rotator from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 21 January 1990, by Japanese astronomers Yoshikane Mizuno and Toshimasa Furuta at Kani Observatory in Japan.

    8116 Jeanperrin, provisional designation 1996 HA15, is a Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 4.8 kilometers (3 miles) in diameter. It was discovered on 17 April 1996, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile. The likely stony S-type asteroid has a rotation period of 3.62 hours and a nearly round shape. It was named for French physicist and Nobel laureate Jean Baptiste Perrin. A minor-planet moon, a third the size of its primary, was discovered in 2007.

    5481 Kiuchi, provisional designation 1990 CH, is a bright binary Vestian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 15 February 1990, by Japanese astronomers Kin Endate and Kazuro Watanabe at Kitami Observatory in Hokkaidō, Japan, and named after their colleague Tsuruhiko Kiuchi. The V-type asteroid has a rotation period of 3.6 hours.

    15350 Naganuma, provisional designation 1994 VB2, is a stony background asteroid from the inner regions of the asteroid belt, approximately 4.3 kilometers (2.7 miles) in diameter. It was discovered on 3 November 1994, by Japanese astronomers Yoshio Kushida and Osamu Muramatsu at the Yatsugatake South Base Observatory. The likely S-type asteroid has a rotation period of 2.5 hours. It was named for the town of Naganuma in northern Japan.

    2815 Soma, provisional designation 1982 RL, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 15 September 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, in the United States. It is named for the mechanical puzzle Soma cube.

    4786 Tatianina, provisional designation 1985 PE2, is a bright background asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 3.4 kilometers (2.1 miles) in diameter. It was discovered on 13 August 1985, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. It was named after Tatiana Somova, a friend of the discoverer. The E-/Xc-subtype has a short rotation period of 2.9 hours. Its sub-kilometer minor-planet moon was discovered on 20 March 2006 and announced the following month.

    3982 Kastelʹ, provisional designation 1984 JP1, is a Florian asteroid and a suspected binary system from the inner regions of the asteroid belt, approximately 6.9 kilometers in diameter.

    5477 Holmes, provisional designation 1989 UH2, is a Hungaria asteroid and binary system from the innermost regions of the asteroid belt, approximately 3 kilometers (2 miles) in diameter. It was discovered on 27 October 1989, by American astronomer Eleanor Helin at the Palomar Observatory in California. The presumed E-type asteroid is likely spherical in shape and has a short rotation period of 2.99 hours. It was named for American amateur astronomer Robert Holmes. The discovery of its 1-kilometer-sized minor-planet moon was announced in November 2005.

    10208 Germanicus, provisional designation 1997 QN1, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 3.5 kilometers in diameter.

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 5905 Johnson (1989 CJ1)" (2018-01-26 last obs.). Jet Propulsion Laboratory . Retrieved 28 February 2018.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(5905) Johnson". Dictionary of Minor Planet Names – (5905) Johnson. Springer Berlin Heidelberg. p. 496. doi:10.1007/978-3-540-29925-7_5520. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 "5905 Johnson (1989 CJ1)". Minor Planet Center. Retrieved 16 March 2017.
    4. 1 2 3 4 5 6 7 "LCDB Data for (5905) Johnson". Asteroid Lightcurve Database (LCDB). Retrieved 16 March 2017.
    5. 1 2 "Asteroid 5905 Johnson – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    6. 1 2 3 4 5 Warner, B.; Pravec, P.; Kusnirak, P.; Pray, D.; Galad, A.; Gajdos, S.; et al. (April 2005). "(5905) Johnson". IAU Circ. 8511 (8511): 2. Bibcode:2005IAUC.8511....2W . Retrieved 16 March 2017.
    7. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522 . Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. S2CID   9341381 . Retrieved 16 March 2017.
    8. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv: 1606.08923 . Bibcode:2016AJ....152...63N. doi: 10.3847/0004-6256/152/3/63 .
    9. 1 2 3 4 Marchis, F.; Enriquez, J. E.; Emery, J. P.; Mueller, M.; Baek, M.; Pollock, J.; et al. (November 2012). "Multiple asteroid systems: Dimensions and thermal properties from Spitzer Space Telescope and ground-based observations". Icarus. 221 (2): 1130–1161. arXiv: 1604.05384 . Bibcode:2012Icar..221.1130M. doi:10.1016/j.icarus.2012.09.013. hdl:2060/20130014861. S2CID   161887 . Retrieved 16 March 2017.
    10. 1 2 3 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv: 1406.6645 . Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. S2CID   119293330 . Retrieved 16 March 2017.
    11. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID   35447010.
    12. 1 2 3 Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026 . Retrieved 16 March 2017.
    13. 1 2 3 Pravec, P.; Scheirich, P.; Vokrouhlický, D.; Harris, A. W.; Kusnirák, P.; Hornoch, K.; et al. (March 2012). "Binary asteroid population. 2. Anisotropic distribution of orbit poles of small, inner main-belt binaries". Icarus. 218 (1): 125–143. Bibcode:2012Icar..218..125P. doi:10.1016/j.icarus.2011.11.026 . Retrieved 16 March 2017.
    14. 1 2 Pravec, P.; Scheirich, P.; Kusnirák, P.; Hornoch, K.; Galád, A.; Naidu, S. P.; et al. (March 2016). "Binary asteroid population. 3. Secondary rotations and elongations". Icarus. 267: 267–295. Bibcode:2016Icar..267..267P. doi: 10.1016/j.icarus.2015.12.019 . Retrieved 16 March 2017.
    15. 1 2 3 Warner, Brian D.; Harris, Alan W.; Pravec, Petr; Cooney, Walter R. Jr.; Gross, John; Terrell, Dirk; et al. (July 2009). "5905 Johnson: A Hungaria Binary". The Minor Planet Bulletin. 36 (3): 89–90. Bibcode:2009MPBu...36...89W. ISSN   1052-8091 . Retrieved 16 March 2017.{{cite journal}}: CS1 maint: multiple names: authors list (link)
    16. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID   53493339 . Retrieved 16 March 2017.
    17. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 16 March 2017.
    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.