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3928 Randa (1981 PG)
Classification: Main-belt Asteroid          SPK-ID: 2003928
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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1894682521486345 1.4793e-08  
a 2.246225238545439 5.5936e-09 au
q 1.820636868666085 3.2654e-08 au
i 2.452672004758936 7.3505e-07 deg
node 269.0580473619401 2.2858e-05 deg
peri 54.61866000410135 2.3091e-05 deg
M 241.0962819228447 4.7472e-06 deg
tp 2459606.635839141656
(2022-Jan-27.13583914)
1.6991e-05 TDB
period 1229.64112859888
3.37
4.5931e-06
1.258e-08
d
yr
n .2927683464932598 1.0936e-09 deg/d
Q 2.671813608424793 6.6534e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3206  
   data-arc span      18136 days (49.65 yr)  
   first obs. used      1971-07-29  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42846  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:18:47  

Additional Information
 Earth MOID = .80772 au 
 Jupiter MOID = 2.64766 au 
 T_jup = 3.606 
[ 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 13.37   n/a MPCxxxxx  
diameter diameter 5.733 km 0.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 29.9 h n/a LCDB (Rev. 2020-October); 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm]
[Galad, A.; Vilagi, J.; Kornos, L.; Gajdos, S. (2009) Minor Planet Bull. 36, 116-118.]
geometric albedo albedo 0.257   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3928 Randa (1981 PG)          Discovered 1981-Aug-04 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 PG = 1971 OP1 = 1978 TW5 = 1980 FL9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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