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JPL Small-Body Database Browser
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997 Priska (A923 NC)
Classification: Main-belt Asteroid          SPK-ID: 2000997
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1830162581883495 3.9059e-08  
a 2.66941491534492 9.8718e-09 au
q 2.180868585986323 1.0598e-07 au
i 10.50875548746396 3.8089e-06 deg
node 247.0985963357559 2.4711e-05 deg
peri 51.20366966711744 2.789e-05 deg
M 342.8326070346399 1.1118e-05 deg
tp 2458676.466898982922
(2019-Jul-11.96689898)
4.9128e-05 TDB
period 1593.024851766022
4.36
8.8368e-06
2.419e-08
d
yr
n .2259851750591995 1.2536e-09 deg/d
Q 3.157961244703517 1.1679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2013  
   data-arc span      35212 days (96.41 yr)  
   first obs. used      1923-07-12  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45532  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:51:58  

Additional Information
 Earth MOID = 1.18173 au 
 Jupiter MOID = 2.07513 au 
 T_jup = 3.334 
[ 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 12.5   n/a MPO394999  
diameter diameter 20.391 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.22 h n/a LCDB (Rev. 2019-January); 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:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.057   0.000 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Ch   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)

997 Priska (A923 NC)          Discovered 1923-Jul-12 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A923 NC = 1959 WA = 1967 RN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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