3122 Florence

3122 Florence
Discovery [1]
Discovered by S. J. Bus
Discovery site Siding Spring Obs.
Discovery date 2 March 1981
Designations
MPC designation (3122) Florence
Named after
 Florence Nightingale
(English pioneer)[2]
1981 ET3 · 1983 CN1
Amor · NEO · PHA [1][3]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 37.22 yr (13,595 days)
Aphelion 2.5164 AU
Perihelion 1.0205 AU
1.7684 AU
Eccentricity 0.4230
2.35 yr (859 days)
267.62°
0° 25m 8.76s / day
Inclination 22.150°
336.10°
27.814°
Earth MOID 0.0453 AU
Physical characteristics
Dimensions 2.5 km (EARN)[4]
4.010±1.237 km[5]
4.349 km[6]
4.35 km (taken)[7]
4.401±0.030 km[8]
4.9 km[1]
2.3580±0.0002 h[9]
2.3581 h[10][lower-alpha 1]
2.3582±0.0003 h[11]
2.359±0.001 h[12]
2.359±0.003 h[13]
5±1 h[14]
0.146[6]
0.21±0.20[15]
0.231±0.049[8][16]
0.258±0.199[5]
SMASS = S [1]
Sq [17] · S [7]
13.87±0.1 (R)[lower-alpha 1] · 14.0[8] · 14.04±0.1 (R)[lower-alpha 1] · 14.1[1] · 14.515±0.11[6][7] · 14.65±0.11[14] · 14.65±0.3[5]

    3122 Florence, provisional designation 1981 ET3, is a stony asteroid of the Amor group, classified as near-Earth object and potentially hazardous asteroid, approximately 5 kilometers in diameter. It was discovered on 2 March 1981 by American astronomer Schelte Bus at Siding Spring Observatory.[3]

    Florence orbits the Sun at a distance of 1.0–2.5 AU once every 2 years and 4 months (859 days). Its orbit has an eccentricity of 0.42 and an inclination of 22° with respect to the ecliptic.[1]

    Florence is classified as a potentially hazardous asteroid (PHA), [1] due to both its absolute magnitude (H ≤ 22) and its minimum orbit intersection distance (MOID ≤ 0.05 AU).[18]

    On 2017-Sep-01 it will pass 0.04723 AU (7,066,000 km; 4,390,000 mi) from Earth[19] and will be as bright as apparent magnitude 8.5.

    Naming citation was published on 6 April 1993 (M.P.C. 21955).[20]

    References

    1. 1 2 3 Pravec (2002/2003) web: rotation period 2.3581±0.0001 hours with a brightness amplitude of 0.15 and 0.18 mag, respectively. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (3122) Florence and Pravec, P.; Wolf, M.; Sarounova, L. (2002)
    1. 1 2 3 4 5 6 7 8 "JPL Small-Body Database Browser: 3122 Florence (1981 ET3)" (2016-05-28 last obs.). Jet Propulsion Laboratory. Retrieved 7 January 2017.
    2. ↑ Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (3122) Florence. Springer Berlin Heidelberg. p. 258. ISBN 978-3-540-00238-3. Retrieved 7 January 2017.
    3. 1 2 "3122 Florence (1981 ET3)". Minor Planet Center. Retrieved 7 January 2017.
    4. ↑ "( 3122) Florence". The Near-Earth Asteroids Data Base at E.A.R.N. Retrieved 2012-06-17.
    5. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Cutri, R. M.; McMillan, R. S.; et al. (November 2012). "Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey". The Astrophysical Journal Letters. 760 (1): 6. Bibcode:2012ApJ...760L..12M. doi:10.1088/2041-8205/760/1/L12. Retrieved 7 January 2017.
    6. 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 7 January 2017.
    7. 1 2 3 "LCDB Data for (3122) Florence". Asteroid Lightcurve Database (LCDB). Retrieved 7 January 2017.
    8. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. Bibcode:2011ApJ...741...90M. arXiv:1109.6407 Freely accessible. doi:10.1088/0004-637X/741/2/90. Retrieved 7 January 2017.
    9. ↑ Warner, Brian D. (July 2016). "Near-Earth Asteorid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 January-April". The Minor Planet Bulletin. 43 (3): 240–250. Bibcode:2016MPBu...43..240W. ISSN 1052-8091. Retrieved 7 January 2017.
    10. ↑ Pravec, Petr; Wolf, Marek; Sarounová, Lenka (November 1998). "Lightcurves of 26 Near-Earth Asteroids". Icarus. 136 (1): 124–153. Bibcode:1998Icar..136..124P. doi:10.1006/icar.1998.5993. Retrieved 7 January 2017.
    11. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (3122) Florence". Geneva Observatory. Retrieved 7 January 2017.
    12. ↑ Linder, Tyler R.; Sampson, Ryan; Holmes, Robert (January 2013). "Astronomical Research Institute Photometric Results". The Minor Planet Bulletin. 40 (1): 4–6. Bibcode:2013MPBu...40....4L. ISSN 1052-8091. Retrieved 7 January 2017.
    13. ↑ Elenin, Leonid; Molotov, Igor (July 2012). "Asteroids Lightcurve Analysis at the Ison-NM Observatory: 3122 Florence, (25916) 2001 CP44, (47035) 1998 WS, (137170) 1999 HF1". The Minor Planet Bulletin. 39 (3): 101–102. Bibcode:2012MPBu...39..101E. ISSN 1052-8091. Retrieved 7 January 2017.
    14. 1 2 Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 7 January 2017.
    15. ↑ Thomas, C. A.; Trilling, D. E.; Emery, J. P.; Mueller, M.; Hora, J. L.; Benner, L. A. M.; et al. (September 2011). "ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population". The Astronomical Journal. 142 (3): 12. Bibcode:2011AJ....142...85T. doi:10.1088/0004-6256/142/3/85. Retrieved 7 January 2017.
    16. ↑ Mainzer, A.; Grav, T.; Bauer, J.; Masiero, J.; McMillan, R. S.; Cutri, R. M.; et al. (December 2011). "NEOWISE Observations of Near-Earth Objects: Preliminary Results". The Astrophysical Journal. 743 (2): 17. Bibcode:2011ApJ...743..156M. arXiv:1109.6400 Freely accessible. doi:10.1088/0004-637X/743/2/156. Retrieved 7 January 2017.
    17. ↑ Thomas, Cristina A.; Emery, Joshua P.; Trilling, David E.; Delbó, Marco; Hora, Joseph L.; Mueller, Michael (January 2014). "Physical characterization of Warm Spitzer-observed near-Earth objects". Icarus. 228: 217–246. Bibcode:2014Icar..228..217T. doi:10.1016/j.icarus.2013.10.004. Retrieved 7 January 2017.
    18. ↑ "NEO Groups". Near Earth Object Program. NASA. Archived from the original on November 2, 2016.
    19. ↑ "JPL Close-Approach Data: 3122 Florence (1981 ET3)" (2012-04-29 last obs). Retrieved 2012-06-17.
    20. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 January 2017.
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