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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1424751003602072 3.4027e-08  
a 2.760216298595608 8.6992e-09 AU
q 2.36695420443732 9.2714e-08 AU
i 7.185379385687641 4.0245e-06 deg
node 10.43308321973805 3.347e-05 deg
peri 3.90377455756961 3.6851e-05 deg
M 335.8716667001936 1.657e-05 deg
tp 2456912.763330825717
(2014-Sep-12.26333083)
7.7351e-05 JED
period 1674.993402780233
4.59
7.9185e-06
2.168e-08
d
yr
n .2149262196510476 1.0161e-09 deg/d
Q 3.153478392753897 9.9386e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1521  
   data-arc span      55005 days (150.60 yr)  
   first obs. used      1863-11-20  
   last obs. used      2014-06-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57665  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 11:53:23  

Additional Information
 Earth MOID = 1.36633 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. 2013-Sep-12) 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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