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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1671865619125511 2.0262e-08  
a 3.999876513961206 2.2535e-08 au
q 3.331150911517272 8.5703e-08 au
i 3.332616595323894 9.1385e-07 deg
node 49.85531903586414 9.394e-06 deg
peri 307.4347429312403 9.9674e-06 deg
M 133.9597388469623 6.4353e-06 deg
tp 2458113.223268268778
(2017-Dec-25.72326827)
4.9571e-05 TDB
period 2921.919875272405
8.00
2.4693e-05
6.761e-08
d
yr
n .1232066638947236 1.0412e-09 deg/d
Q 4.66860211640514 2.6303e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3064  
   data-arc span      35168 days (96.28 yr)  
   first obs. used      1924-11-29  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44588  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:08:24  

Additional Information
 Earth MOID = 2.32713 au 
 Jupiter MOID = .793119 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 10.07   n/a E2021B10  
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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