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2815 Soma (1982 RL)
Classification: Main-belt Asteroid          SPK-ID: 2002815
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683233080055894 3.6553e-08  
a 2.232903403836582 5.887e-09 au
q 1.857053716445868 8.0606e-08 au
i 5.705358079999098 3.6083e-06 deg
node 119.8143931953833 3.8265e-05 deg
peri 237.7476097363869 3.9895e-05 deg
M 345.460784943002 1.1737e-05 deg
tp 2458649.720020494153
(2019-Jun-15.22002049)
3.9779e-05 TDB
period 1218.718294518003
3.34
4.8197e-06
1.32e-08
d
yr
n .2953922999427675 1.1682e-09 deg/d
Q 2.608753091227296 6.8779e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2581  
   data-arc span      23544 days (64.46 yr)  
   first obs. used      1955-06-22  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42808  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:21:02  

Additional Information
 Earth MOID = .858977 au 
 Jupiter MOID = 2.83261 au 
 T_jup = 3.615 
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Orbital Elements at Epoch 2456531.5 (2013-Aug-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1689413321225069 3.6653e-08  
q 1.856285010172814 8.0945e-08 au
tp 2456212.175382947496
(2012-Oct-11.67538295)
3.8372e-05 TDB
node 119.8800562939744 3.8281e-05 deg
peri 237.7660832183813 3.9885e-05 deg
i 5.703912329917755 3.6073e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2581  
   data-arc span      23544 days (64.46 yr)  
   first obs. used      1955-06-22  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42808  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:21:02  

Additional Information
 Jupiter MOID = 2.83261 au 
 T_jup = 3.615 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.343462240348974E-15 -2.961741191067117E-15 2.117846303341321E-13 2.588862419336131E-15 1.329494480652834E-14 -7.425018111066263E-16
q -2.961741191067117E-15 6.552029304721102E-15 -4.775698104835925E-13 -6.202252710542756E-15 -3.059151793346309E-14 1.589379183765747E-15
tp 2.117846303341321E-13 -4.775698104835925E-13 1.472410328473287E-9 -1.081192174146911E-11 4.403024840370549E-10 -1.711691273396454E-12
node 2.588862419336131E-15 -6.202252710542756E-15 -1.081192174146911E-11 1.465398825838362E-9 -1.460927735974513E-9 -1.093466505413172E-11
peri 1.329494480652834E-14 -3.059151793346309E-14 4.403024840370549E-10 -1.460927735974513E-9 1.590833878239594E-9 1.039586060762894E-11
i -7.425018111066263E-16 1.589379183765747E-15 -1.711691273396454E-12 -1.093466505413172E-11 1.039586060762894E-11 1.301280237165322E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7   n/a MPO395021  
diameter diameter 6.641 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.73325 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2009) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pollock, J.; Pravec, P.; Kusnirak, P.; Hornoch, K.; et al. (2011) CBET 2705.]
geometric albedo albedo 0.365   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2815 Soma (1982 RL)          Discovered 1982-Sep-15 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1982 RL = 1955 MH = 1970 AC = 1974 DL = 1979 XB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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