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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1413885050839002 4.2697e-08  
a 2.98663720482986 1.2565e-08 au
q 2.564361035211008 1.2854e-07 au
i 10.68987964364712 4.2107e-06 deg
node 46.13076958401473 2.2949e-05 deg
peri 288.6775953314946 2.6454e-05 deg
M 239.1640825297594 1.4994e-05 deg
tp 2459833.298842748608
(2022-Sep-10.79884275)
7.9543e-05 TDB
period 1885.263820218051
5.16
1.1897e-05
3.257e-08
d
yr
n .1909547067838825 1.205e-09 deg/d
Q 3.408913374448712 1.4341e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3111  
   data-arc span      38342 days (104.97 yr)  
   first obs. used      1916-01-30  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42101  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:49:14  

Additional Information
 Earth MOID = 1.57868 au 
 Jupiter MOID = 2.08219 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456357.5 (2013-Mar-06.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1362069344120576 4.1878e-08  
q 2.583037390769602 1.2488e-07 au
tp 2456051.081703578755
(2012-May-03.58170358)
8.0821e-05 TDB
node 46.53943655545285 2.2877e-05 deg
peri 287.1535290950548 2.6921e-05 deg
i 10.70584670012977 4.2071e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3111  
   data-arc span      38342 days (104.97 yr)  
   first obs. used      1916-01-30  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42101  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:49:14  

Additional Information
 Jupiter MOID = 2.08219 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.753768520373537E-15 -5.210096189211615E-15 1.173517943943278E-12 -5.921905899426667E-16 1.980334861229515E-13 1.967810201337585E-15
q -5.210096189211615E-15 1.559409758523331E-14 -3.472614114568681E-12 1.411646432942387E-15 -5.849204848232919E-13 -5.724819482304225E-15
tp 1.173517943943278E-12 -3.472614114568681E-12 6.532024755223133E-9 -5.874404100802344E-12 1.179283256934231E-9 2.261958930721489E-12
node -5.921905899426667E-16 1.411646432942387E-15 -5.874404100802344E-12 5.23335924259726E-10 -5.144273293898101E-10 -3.302629333724532E-11
peri 1.980334861229515E-13 -5.849204848232919E-13 1.179283256934231E-9 -5.144273293898101E-10 7.2474852392605E-10 3.27836821261544E-11
i 1.967810201337585E-15 -5.724819482304225E-15 2.261958930721489E-12 -3.302629333724532E-11 3.27836821261544E-11 1.76996238515165E-11

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

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