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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2067935011614566 5.2088e-08  
a 3.951414005480271 3.7606e-08 au
q 3.134287268748591 2.1173e-07 au
i 17.52631880971928 6.2371e-06 deg
node 352.6080414801181 1.4677e-05 deg
peri 306.1179851590238 1.8958e-05 deg
M 11.21980235270201 1.5246e-05 deg
tp 2458911.085091833189
(2020-Mar-02.58509183)
0.00012077 TDB
period 2868.978073602156
7.85
4.0957e-05
1.121e-07
d
yr
n .1254802200520134 1.7913e-09 deg/d
Q 4.768540742211951 4.5383e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2616  
   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      .38184  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:18:30  

Additional Information
 Earth MOID = 2.15987 au 
 Jupiter MOID = .934137 au 
 T_jup = 2.943 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456291.5 (2012-Dec-30.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .209576964181844 5.2095e-08  
q 3.114058487290073 2.1199e-07 au
tp 2456062.919055368662
(2012-May-15.41905537)
0.00010567 TDB
node 352.8681995468526 1.4693e-05 deg
peri 307.2581126497458 1.8758e-05 deg
i 17.55534152365519 6.2375e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2616  
   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      .38184  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:18:30  

Additional Information
 Jupiter MOID = .934137 au 
 T_jup = 2.943 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.713937265743859E-15 -1.094760252114351E-14 1.16691418475023E-12 7.28761362409158E-15 1.841818155288956E-13 2.208894455346461E-15
q -1.094760252114351E-14 4.493960230869091E-14 -4.020742826518435E-12 -3.023493424047581E-14 -6.652192737364471E-13 -6.798720101007915E-15
tp 1.16691418475023E-12 -4.020742826518435E-12 1.116591643517022E-8 3.443400523578355E-12 1.264404439880282E-9 4.340194761158918E-12
node 7.28761362409158E-15 -3.023493424047581E-14 3.443400523578355E-12 2.158706662817665E-10 -2.050698740703828E-10 -3.029978995732325E-11
peri 1.841818155288956E-13 -6.652192737364471E-13 1.264404439880282E-9 -2.050698740703828E-10 3.518479288775812E-10 2.942188547088209E-11
i 2.208894455346461E-15 -6.798720101007915E-15 4.340194761158918E-12 -3.029978995732325E-11 2.942188547088209E-11 3.890678342695807E-11

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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