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55 Pandora
Classification: Main-belt Asteroid          SPK-ID: 2000055
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1423221164466815 3.4029e-08  
a 2.75971911249431 8.6557e-09 AU
q 2.366950047605762 9.2711e-08 AU
i 7.185789020044857 4.0247e-06 deg
node 10.4327750502931 3.346e-05 deg
peri 3.916496083461164 3.6846e-05 deg
M 18.85261596760047 1.6668e-05 deg
tp 2456912.807011845829
(2014-Sep-12.30701185)
7.7332e-05 JED
period 1674.540858932046
4.58
7.8781e-06
2.157e-08
d
yr
n .2149843033567979 1.0114e-09 deg/d
Q 3.152488177382858 9.8876e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1548  
   data-arc span      55030 days (150.66 yr)  
   first obs. used      1863-11-20  
   last obs. used      2014-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57162  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:51:04  

Additional Information
 Earth MOID = 1.36767 AU 
 T_jup = 3.316 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.7 mag n/a MPO234839  
diameter diameter 66.70 km 2.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
rotation period rot_per 4.8040 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Schober, H.J. (1978) Astron. Astrophys. Suppl. Ser. 34, 377-381.]
[Barucci, M.A.; Fulchignoni, M.; Burchi, R.; D'Ambrosio, V. (1985) Icarus 61, 152-162.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Lagerkvist, C.-I.; Erikson, A.; Debehogne, H.; Festin, L.; et al. (1995) Astron. Astrophys. Suppl. Ser. 113, 115-129.]
[Michalowski, T. (1996) Icarus 123, 456-462.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
geometric albedo albedo 0.3013   0.028 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
B-V BV .704 mag .024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=2.83, mean=10.78, max.=19.01) deg.
U-B UB .242 mag .023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=3.79, mean=6.51, max.=11.04) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

55 Pandora          Discovered 1858-Sep-10 by Searle, G. at Albany
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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