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3972 Richard (1981 JD3)
Classification: Main-belt Asteroid          SPK-ID: 2003972
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1771885697860347 1.3217e-08  
a 2.163511186015329 4.1441e-09 au
q 1.780161733249185 2.8611e-08 au
i 4.149708770494869 6.9796e-07 deg
node 163.2190541170586 1.0363e-05 deg
peri 179.1147199992267 1.2187e-05 deg
M 63.3539107602413 7.1295e-06 deg
tp 2458995.945954946751
(2020-May-26.44595495)
2.2897e-05 TDB
period 1162.350600547033
3.18
3.3396e-06
9.143e-09
d
yr
n .3097172228676739 8.8986e-10 deg/d
Q 2.546860638781472 4.8783e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      25666 days (70.27 yr)  
   first obs. used      1950-12-10  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44587  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:20:02  

Additional Information
 Earth MOID = .770219 au 
 Jupiter MOID = 2.8475 au 
 T_jup = 3.671 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.93   n/a MPCxxxxx  
diameter diameter 4.124 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.180   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3972 Richard (1981 JD3)          Discovered 1981-May-06 by Shoemaker, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 JD3 = 1950 XF = 1953 VW = 1972 RN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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