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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1411774960920094 4.319e-08  
a 2.987302099394372 1.2698e-08 au
q 2.565562268931472 1.2983e-07 au
i 10.68870761388802 4.2143e-06 deg
node 46.13644576938361 2.3167e-05 deg
peri 288.6180646744097 2.6664e-05 deg
M 201.0326476264297 1.4986e-05 deg
tp 2459833.265228592006
(2022-Sep-10.76522859)
7.9831e-05 TDB
period 1885.893410293508
5.16
1.2024e-05
3.292e-08
d
yr
n .1908909581183446 1.2171e-09 deg/d
Q 3.409041929857273 1.449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2966  
   data-arc span      38125 days (104.38 yr)  
   first obs. used      1916-01-30  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42839  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:19:38  

Additional Information
 Earth MOID = 1.58168 au 
 Jupiter MOID = 2.08185 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456275.5 (2012-Dec-14.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1360655648960886 4.2348e-08  
q 2.582700299993486 1.2609e-07 au
tp 2456050.686589187312
(2012-May-03.18658919)
8.1052e-05 TDB
node 46.53857366464709 2.309e-05 deg
peri 287.0569617318548 2.7133e-05 deg
i 10.70704937057649 4.2121e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2966  
   data-arc span      38125 days (104.38 yr)  
   first obs. used      1916-01-30  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42839  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:19:38  

Additional Information
 Jupiter MOID = 2.08185 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.793318731009935E-15 -5.319856751249917E-15 1.182898089265279E-12 -7.407407362583121E-16 1.974281830031177E-13 2.039730552627065E-15
q -5.319856751249917E-15 1.589949514270587E-14 -3.494823616341689E-12 1.059680948538515E-15 -5.821229941474922E-13 -5.860034459647004E-15
tp 1.182898089265279E-12 -3.494823616341689E-12 6.569378315472273E-9 -6.867106718212952E-12 1.187681755608616E-9 2.292689775181415E-12
node -7.407407362583121E-16 1.059680948538515E-15 -6.867106718212952E-12 5.331293926366238E-10 -5.242508181102458E-10 -3.278029087067295E-11
peri 1.974281830031177E-13 -5.821229941474922E-13 1.187681755608616E-9 -5.242508181102458E-10 7.362206714417976E-10 3.254777116708191E-11
i 2.039730552627065E-15 -5.860034459647004E-15 2.292689775181415E-12 -3.278029087067295E-11 3.254777116708191E-11 1.774214220789023E-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 9.7   n/a MPO502160 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. 2019-August); 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]
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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