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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1686385386258639 3.5598e-08  
a 2.233169291109952 5.6192e-09 au
q 1.856570885353013 7.8288e-08 au
i 5.705612927338182 3.4001e-06 deg
node 119.8115472999468 3.55e-05 deg
peri 237.7902808068494 3.7109e-05 deg
M 162.6051421421182 1.1453e-05 deg
tp 2458649.929836800289
(2019-Jun-15.42983680)
3.8261e-05 TDB
period 1218.935982840341
3.34
4.6007e-06
1.26e-08
d
yr
n .2953395461844806 1.1147e-09 deg/d
Q 2.609767696866891 6.5668e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2924  
   data-arc span      23958 days (65.59 yr)  
   first obs. used      1955-06-22  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:05:50  

Additional Information
 Earth MOID = .857713 au 
 Jupiter MOID = 2.83597 au 
 T_jup = 3.615 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456949.5 (2014-Oct-19.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1694789765711098 3.5706e-08  
q 1.854132439569057 7.8586e-08 au
tp 2457430.476846617293
(2016-Feb-11.97684662)
3.7136e-05 TDB
node 119.8817159707735 3.5518e-05 deg
peri 237.6356690278965 3.71e-05 deg
i 5.704893239457718 3.3994e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2924  
   data-arc span      23958 days (65.59 yr)  
   first obs. used      1955-06-22  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:05:50  

Additional Information
 Jupiter MOID = 2.83597 au 
 T_jup = 3.615 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.27490022682932E-15 -2.801462835337476E-15 3.206029808634433E-13 1.186053029280009E-15 3.315698579646655E-14 -8.88582042709819E-16
q -2.801462835337476E-15 6.175688572745392E-15 -6.968679910483665E-13 -2.670041663051386E-15 -7.343012810443501E-14 1.921819974701486E-15
tp 3.206029808634433E-13 -6.968679910483665E-13 1.379110385946695E-9 -8.010716351463342E-12 4.03961631541401E-10 -1.646605556747959E-12
node 1.186053029280009E-15 -2.670041663051386E-15 -8.010716351463342E-12 1.261540333238381E-9 -1.257276446308368E-9 -1.537138565324042E-11
peri 3.315698579646655E-14 -7.343012810443501E-14 4.03961631541401E-10 -1.257276446308368E-9 1.376403364738587E-9 1.484613204036722E-11
i -8.88582042709819E-16 1.921819974701486E-15 -1.646605556747959E-12 -1.537138565324042E-11 1.484613204036722E-11 1.15560542515616E-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 12.77   n/a E2021B10  
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. 2020-October); 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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