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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1669949188432249 4.2306e-08  
a 4.000051378469711 2.6651e-08 au
q 3.332063123153432 1.6417e-07 au
i 3.332706990672417 4.3587e-06 deg
node 49.86737369348791 7.5792e-05 deg
peri 307.4032633538009 7.6789e-05 deg
M 109.3617209551384 1.2587e-05 deg
tp 2458112.813497468688
(2017-Dec-25.31349747)		 9.8912e-05 TDB
period 2922.111485812871
8.00		 2.9203e-05
7.995e-08		 d
yr
n .1231985849095198 1.2312e-09 deg/d
Q 4.66803963378599 3.1101e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2791  
   data-arc span      35049 days (95.96 yr)  
   first obs. used      1924-11-29  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45826  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:59:06  

Additional Information
 Earth MOID = 2.3297 au 
 Jupiter MOID = .79276 au 
 T_jup = 3.027 
[ show covariance matrix ]

[ 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 9.558 h n/a LCDB (Rev. 2020-October); 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.]
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 196-199.]
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

[ show close-approach data ]
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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