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28 Bellona
Classification: Main-belt Asteroid          SPK-ID: 2000028
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1514529172467697 2.8712e-08  
a 2.775241802693434 5.787e-09 AU
q 2.354923335610329 8.0323e-08 AU
i 9.43333649312615 3.6097e-06 deg
node 144.3243220338017 1.6041e-05 deg
peri 344.6164572454618 1.815e-05 deg
M 291.8706526535632 9.2387e-06 deg
tp 2457320.081328288528
(2015-Oct-24.58132829)
4.3654e-05 JED
period 1688.688981546324
4.62
5.2819e-06
1.446e-08
d
yr
n .2131831284114555 6.668e-10 deg/d
Q 3.195560269776539 6.6634e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1881  
   data-arc span      57650 days (157.84 yr)  
   first obs. used      1856-09-29  
   last obs. used      2014-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .6017  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:50:52  

Additional Information
 Earth MOID = 1.37125 AU 
 T_jup = 3.299 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.09 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
diameter diameter 120.90 km 3.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
rotation period rot_per 15.706 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2007) Minor Planet Bul. 34, 104-107.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Pilcher, F. (2011) Minor Planet Bul. 38, 156-158.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.1763   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
B-V BV .845 mag .010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=1.74, mean=10.22, max.=22.69) deg.
U-B UB .469 mag .027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=14.00, mean=17.13, max.=22.69) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

28 Bellona          Discovered 1854-Mar-01 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1951 CC2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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