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JPL Small-Body Database Browser
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1877 Marsden (1971 FC)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001877
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2067934981642471 5.1607e-08  
a 3.951414002785931 3.6847e-08 au
q 3.134287278454639 2.1059e-07 au
i 17.52631814351396 6.1186e-06 deg
node 352.6080423898869 1.4582e-05 deg
peri 306.1179831795749 1.8696e-05 deg
M 11.21980402143037 1.4665e-05 deg
tp 2458911.085078625906
(2020-Mar-02.58507863)
0.00011619 TDB
period 2868.978070667763
7.85
4.013e-05
1.099e-07
d
yr
n .1254802201803547 1.7552e-09 deg/d
Q 4.768540727117224 4.4467e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2657  
   data-arc span      25162 days (68.89 yr)  
   first obs. used      1950-10-05  
   last obs. used      2019-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37931  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:07:06  

Additional Information
 Earth MOID = 2.15987 au 
 Jupiter MOID = .934137 au 
 T_jup = 2.943 
[ 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 10.9   n/a MPO452186  
diameter diameter 35.642 km 0.370 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 13.18 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2018) Minor Planet Bull. 45, 390-393.]
geometric albedo albedo 0.073   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

1877 Marsden (1971 FC)          Discovered 1971-Mar-24 by Van Houten, C. J. at Palomar
Discovered by C. J. van Houten and I. van Houten-Groeneveld, Leiden, on plates exposed by T. Gehrels in a survey of faint Trojans with the 122 cm Schmidt camera at Palomar.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1971 FC = 1950 TG = 1950 TT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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