4147 Lennon

4147 Lennon, provisional designation 1983 AY, is a stony Vestian asteroid and a potentially slow rotator from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by American astronomer Brian Skiff at Lowell's Anderson Mesa Station on 12 January 1983.[9] It was later named after musician John Lennon.[2]

4147 Lennon
Discovery [1]
Discovered byB. A. Skiff
Discovery siteAnderson Mesa Stn.
Discovery date12 January 1983
Designations
(4147) Lennon
Named after
John Lennon
(musician, The Beatles)[2]
1983 AY · 1971 YG
1980 KA
main-belt · Vestian [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc44.51 yr (16,258 days)
Aphelion2.5524 AU
Perihelion2.1712 AU
2.3618 AU
Eccentricity0.0807
3.63 yr (1,326 days)
88.732°
0° 16m 17.4s / day
Inclination5.7326°
288.57°
302.94°
Physical characteristics
Dimensions5.171±0.087 km[4][5]
7.13±0.37 km[6]
7.46 km (calculated)[3]
137 h[7]
0.20 (assumed)[3]
0.240±0.049[6]
0.4166±0.0564[4]
V [7]:5 · S [3]
12.90[6] · 13.0[1][3][4] · 13.63±0.34[8]

    Orbit and classification

    Lennon is a member of the Vesta family, which is named after the main-belt's second largest asteroid, 4 Vesta. It orbits the Sun in the inner main-belt at a distance of 2.2–2.6 AU once every 3 years and 8 months (1,326 days). Its orbit has an eccentricity of 0.08 and an inclination of 6° with respect to the ecliptic.[1] The first observation was made at Crimea–Nauchnij in 1971, extending the asteroid's observation arc by 12 years prior to its discovery.[9]

    Physical characteristics

    Lennon has been characterized as a V-type asteroid.[7]:5

    Slow rotator

    In October 2004, a rotational lightcurve of Lennon was obtained during a photometric survey of V-type asteroids at several observatories in Japan. The fragmentary lightcurve gave a very long rotation period of 137 hours with a high brightness variation of 0.6 in magnitude (U=1).[7]

    Diameter and albedo

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Lennon measures 5.2 and 7.1 kilometers in diameter and its surface has an albedo of 0.24 of 0.42, respectively.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for S-type asteroids of 0.20 and calculates a diameter of 7.5 kilometers with an absolute magnitude of 13.0.[3] The discrepancy is due to disagreement on the body's spectral type (V or S).

    Naming

    This minor planet was named in memory of English musician John Lennon (1940–1980), famous for his song "Imagine" and co-founder of The Beatles, one of the most successful bands in the history of popular music, who are famous for their album "Sgt. Pepper's Lonely Hearts Club Band".[2]

    The minor planets 8749 Beatles, 4149 Harrison, 4148 McCartney and 4150 Starr, were named after the band and its three other members. The official naming citation was published by the Minor Planet Center on 10 April 1990 (M.P.C. 16247).[10]

    gollark: Does anyone actually want 1.13 support given that forge mods won't work for a bit?
    gollark: I mean, asymmetric cryptography can be made pretty secure for stuff.
    gollark: Useless how?
    gollark: <@157279244962103296>
    gollark: Here's an idea: separate the parts of your reactor controller for "allow fancy temperature readings" and "stop whole place blowing up" and only hook the temperature reader up to the network.

    References
    1. "JPL Small-Body Database Browser: 4147 Lennon (1983 AY)" (2016-06-20 last obs.). Jet Propulsion Laboratory. Retrieved 20 June 2017.
    2. Schmadel, Lutz D. (2007). "(4147) Lennon". Dictionary of Minor Planet Names – (4147) Lennon. Springer Berlin Heidelberg. p. 354. doi:10.1007/978-3-540-29925-7_4119. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (4147) Lennon". Asteroid Lightcurve Database (LCDB). Retrieved 10 August 2016.
    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.
    5. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 5 December 2016.
    6. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 10 August 2016.
    7. Hasegawa, S.; Miyasaka, S.; Mito, H.; Sarugaku, Y.; Ozawa, T.; Kuroda, D.; et al. (May 2012). "Lightcurve Survey of V-Type Asteroids. Observations Until 2005". Asteroids. 1667: 6281. arXiv:1204.0548. Bibcode:2012LPICo1667.6281H.
    8. 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. Retrieved 10 August 2016.
    9. "4147 Lennon (1983 AY)". Minor Planet Center. Retrieved 10 August 2016.
    10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 August 2016.

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