1223 Neckar

1223 Neckar
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 6 October 1931
Designations
MPC designation 1223 Neckar
Named after
 Neckar
(river)[2]
1931 TG · 1930 MN
1931 TA1 · 1953 FC
A907 VD · A909 BD
A917 XC · A917 YA
main-belt · Koronis [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 107.95 yr (39,427 days)    
Aphelion 3.0332 AU
Perihelion 2.7049 AU
2.8691 AU
Eccentricity 0.0572
4.86 yr (1,775 days)
34.045°
Inclination 2.5449°
40.848°
13.934°
Physical characteristics
Dimensions 23.06±0.56 km[4]
25.736±0.261 km[5]
26.07±0.86 km[6]
24.68±0.55 km[7]
27.96 km (derived)[3]
7.81 h[8]
8.6 h[lower-alpha 1]
8.78 h[9]
7.763 h[10]
7.82124 h[11]
7.82401±0.00005 h[12]
7.8273±0.0036 h[13]
0.123[14]
0.201±0.011[4]
0.1461±0.0271[5]
0.152±0.025[6]
0.170±0.012[7]
B–V = 0.840
U–B = 0.405
Tholen = S
S [3]
10.58

    1223 Neckar, provisional designation 1931 TG, is a stony asteroid from the outer region of the asteroid belt, about 26 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany on 6 October 1931.[15]

    The S-type asteroid is a member of the Koronis family, thought to have been formed at least two billion years ago in a catastrophic collision between two larger bodies. It orbits the Sun at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,775 days). Its orbit shows an eccentricity of 0.06 and is tilted by 3 degrees to the plane of the ecliptic. It has a rotation period of 7.83 hours, observed by the Palomar Transient Factory Survey in 2010,[13] and an albedo in the range of 0.12 to 0.20, according to the surveys carried out by Akari and WISE/NEOWISE.[4][5][6][7]

    The minor planet was named after the 367-kilometre-long river Neckar, running through the southwestern parts of Germany and in particular through the city of Heidelberg, location of the discovering observatory. The river origins in the Black Forrest and flows into the Rhine river.[2]

    References

    1. ↑ Tedesco (1979) web: rotation period 8.6 hours with a brightness amplitude of 0.45 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1223) Neckar
    1. 1 2 "JPL Small-Body Database Browser: 1223 Neckar (1931 TG)" (2015-10-13 last obs.). Jet Propulsion Laboratory. Retrieved November 2015.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1223) Neckar. Springer Berlin Heidelberg. p. 102. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 "LCDB Data for (1223) Neckar". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
    5. 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". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
    6. 1 2 3 Hasegawa, Sunao; Müller, Thomas G.; Kuroda, Daisuke; Takita, Satoshi; Usui, Fumihiko (April 2013). "The Asteroid Catalog Using AKARI IRC Slow-Scan Observations". Publications of the Astronomical Society of Japan 65 (2): 11. arXiv:1210.7557. Bibcode:2012arXiv1210.7557H. doi:10.1093/pasj/65.2.34. Retrieved November 2015.
    7. 1 2 3 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 November 2015.
    8. ↑ Slivan, Stephen M.; Binzel, Richard P. (December 1996). "Forty-eight New Rotation Lightcurves of 12 Koronis Family Asteroids". Icarus 124 (2): 452–470. Bibcode:1996Icar..124..452S. doi:10.1006/icar.1996.0222. Retrieved November 2015.
    9. ↑ Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus: 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035. Retrieved November 2015.
    10. ↑ Michalowski, T.; Pych, W.; Berthier, J.; Kryszczynska, A.; Kwiatkowski, T.; Boussuge, J.; et al. (November 2000). "CCD photometry, spin and shape models of five asteroids: 225, 360, 416, 516, and 1223". Astronomy and Astrophysics Supplement: 471–479. Bibcode:2000A&AS..146..471M. doi:10.1051/aas:2000282. Retrieved November 2015.
    11. ↑ Slivan, Stephen M.; Binzel, Richard P.; Crespo da Silva, Lucy D.; Kaasalainen, Mikko; Lyndaker, Mariah M.; Krco, Marko (April 2003). "Spin vectors in the Koronis family: comprehensive results from two independent analyses of 213 rotation lightcurves". Icarus 162 (2): 285–307. Bibcode:2003Icar..162..285S. doi:10.1016/S0019-1035(03)00029-0. Retrieved November 2015.
    12. ↑ Hanus, J.; Durech, J.; Broz, M.; Warner, B. D.; Pilcher, F.; Stephens, R.; et al. (June 2011). "A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method". Astronomy & Astrophysics 530: 16. arXiv:1104.4114. Bibcode:2011A&A...530A.134H. doi:10.1051/0004-6361/201116738. Retrieved November 2015.
    13. 1 2 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved November 2015.
    14. ↑ Morrison, D.; Zellner, B. (December 1978). "Polarimetry and radiometry of the asteroids". In: Asteroids. (A80-24551 08-91) Tucson: 1090–1097. Bibcode:1979aste.book.1090M. Retrieved November 2015.
    15. ↑ "1223 Neckar (1931 TG)". Minor Planet Center. Retrieved November 2015.

    External links

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