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JPL Small-Body Database Browser
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251 Sophia
Classification: Main-belt Asteroid          SPK-ID: 2000251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09637215531577403 3.4136e-08  
a 3.102491344900365 1.2935e-08 au
q 2.803497567143782 1.0293e-07 au
i 10.51107718408776 3.9386e-06 deg
node 156.0170101074898 2.0436e-05 deg
peri 286.5073140203383 2.9186e-05 deg
M 192.5344325368993 2.1783e-05 deg
tp 2459929.011569283108
(2022-Dec-15.51156928)
0.00012307 TDB
period 1996.017270926876
5.46
1.2483e-05
3.418e-08
d
yr
n .1803591608367344 1.1279e-09 deg/d
Q 3.401485122656948 1.4182e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2794  
   data-arc span      49050 days (134.29 yr)  
   first obs. used      1885-10-04  
   last obs. used      2020-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44665  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:22:01  

Additional Information
 Earth MOID = 1.84254 au 
 Jupiter MOID = 1.82229 au 
 T_jup = 3.189 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.9   n/a MPO302059  
diameter diameter 27.495 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 20.216 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Holliday, B. (2001) Minor Planet Bull. 28, 26-28.]
[Behrend, R. (2005) 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]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.234   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

251 Sophia          Discovered 1885-Oct-04 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1950 RH1 = 1953 FN1 = A907 UA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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