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1202 Marina (1931 RL)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001202
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1669949195864591 4.2467e-08  
a 4.000051378194649 2.6775e-08 au
q 3.332063119951329 1.6501e-07 au
i 3.332707142979486 4.4918e-06 deg
node 49.86737238181099 7.589e-05 deg
peri 307.4032648393337 7.6926e-05 deg
M 109.3617208754173 1.266e-05 deg
tp 2458112.813498207345
(2017-Dec-25.31349821)
9.962e-05 TDB
period 2922.111485511465
8.00
2.9339e-05
8.033e-08
d
yr
n .1231985849222273 1.237e-09 deg/d
Q 4.668039636437969 3.1246e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2679  
   data-arc span      34847 days (95.41 yr)  
   first obs. used      1924-11-29  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46556  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:20:49  

Additional Information
 Earth MOID = 2.3297 au 
 Jupiter MOID = .79276 au 
 T_jup = 3.027 
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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 10.0   n/a MPO347524  
diameter diameter 54.93 km 2.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
rotation period rot_per 9.45 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.0337   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12

1202 Marina (1931 RL)          Discovered 1931-Sep-13 by Neujmin, G. at Simeis
Independent discovery Sept. 15 by K. Reinmuth, Heidelberg, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1931 RL = 1931 TH = 1980 BL3 = A924 WG = A924 YA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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