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731 Sorga (A912 GH)
Classification: Main-belt Asteroid          SPK-ID: 2000731
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1413885318555222 1.9886e-08  
a 2.986637213018207 1.1914e-08 au
q 2.564360962284494 6.424e-08 au
i 10.68987196534169 7.3297e-07 deg
node 46.13078120119128 5.4404e-06 deg
peri 288.6775803802257 8.1578e-06 deg
M 239.1640819537005 9.2875e-06 deg
tp 2459833.298848367719
(2022-Sep-10.79884837)
5.038e-05 TDB
period 1885.263827971182
5.16
1.1281e-05
3.089e-08
d
yr
n .1909547059985829 1.1426e-09 deg/d
Q 3.408913463751919 1.3598e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3224  
   data-arc span      38396 days (105.12 yr)  
   first obs. used      1916-01-30  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41402  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:21:15  

Additional Information
 Earth MOID = 1.57868 au 
 Jupiter MOID = 2.08219 au 
 T_jup = 3.216 
[ 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 9.73   n/a E2021B10 IRAS observations used: 10
diameter diameter 34.597 km 0.409 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.184 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2005) Minor Planet Bull. 32, 90-92.]
[Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.209   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.691   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.96, mean=6.80, max.=11.63) deg.
U-B UB 0.312   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.96, mean=6.80, max.=11.63) deg.
Tholen spectral type spec_T CD   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Xe   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)

731 Sorga (A912 GH)          Discovered 1912-Apr-15 by Massinger, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1908-Apr-03 04:25 00:03 Amphi 0.0498371949883122 0.0498340949523518 0.0498402964746947 3.14606005649957 3.14606001983451 2418034.683954913 2.93297780004766 459.461018489216 31.556311739362 -70.7396758989671 222916.127134789 T 55 CATAB v2.0f-lin.ifort 2021-Apr-12 11:22:33 2021-Apr-12 11:22
1913-Jan-20 06:58 00:02 Iris 0.0309010192694087 0.0308979857716781 0.0309040543562978 5.0381596241323 5.03815958720664 2419787.790535113 2.30158983212649 386.240737537696 27.8282708656116 67.2980156483165 153260.344566938 T 55 CATAB v2.0f-lin.ifort 2021-Apr-12 11:22:33 2021-Apr-12 11:22

Alternate Designations
 A912 GH = 1940 WP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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