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970 Primula (A921 WK)
Classification: Main-belt Asteroid          SPK-ID: 2000970
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2716555676350114 4.1812e-08  
a 2.559813852388504 8.4611e-09 au
q 1.86442616727794 1.1137e-07 au
i 5.033092874029414 4.0638e-06 deg
node 310.7736428892491 4.2542e-05 deg
peri 95.56423976121202 4.3674e-05 deg
M 17.50148301413081 1.1532e-05 deg
tp 2458927.775062898504
(2020-Mar-19.27506290)
4.7645e-05 TDB
period 1495.929078432947
4.10
7.4168e-06
2.031e-08
d
yr
n .2406531199842148 1.1932e-09 deg/d
Q 3.255201537499068 1.076e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2379  
   data-arc span      35861 days (98.18 yr)  
   first obs. used      1921-11-29  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4327  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:42:05  

Additional Information
 Earth MOID = .882171 au 
 Jupiter MOID = 2.18769 au 
 T_jup = 3.378 
[ 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 12.3   n/a MPO502162  
diameter diameter 9.204 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.777 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Maleszewski, C.; Clark, M. (2004) Minor Planet Bull. 31, 93-94.]
[Sada, P.V.; Canizales, E.D.; Armada, E.M. (2004) Minor Planet Bull. 31, 49-50.]
[Clark, M. (2012) Minor Planet Bull. 39, 63-65.]
geometric albedo albedo 0.229   0.031 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)

970 Primula (A921 WK)          Discovered 1921-Nov-29 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A921 WK = 1929 RN = 1966 TG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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