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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2714973450275558 4.2031e-08  
a 2.559953152506498 8.6474e-09 au
q 1.864932668206062 1.1198e-07 au
i 5.032458985279774 4.0971e-06 deg
node 310.7756794874929 4.2622e-05 deg
peri 95.51629724469875 4.3779e-05 deg
M 281.2653734556679 1.139e-05 deg
tp 2458927.697310037087
(2020-Mar-19.19731004)
4.8586e-05 TDB
period 1496.051188444111
4.10
7.5804e-06
2.075e-08
d
yr
n .240633477504469 1.2193e-09 deg/d
Q 3.254973636806934 1.0995e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2253  
   data-arc span      35792 days (97.99 yr)  
   first obs. used      1921-11-29  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44172  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:14:57  

Additional Information
 Earth MOID = .882164 au 
 Jupiter MOID = 2.1866 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 12.2   n/a MPO435704  
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-January); 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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