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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1826166554231605 3.7999e-08  
a 2.66838519688545 9.4771e-09 au
q 2.181093616849557 1.0262e-07 au
i 10.50840459508611 3.7893e-06 deg
node 247.0964612121836 2.3771e-05 deg
peri 51.21992210116213 2.6759e-05 deg
M 73.26256202692478 1.0687e-05 deg
tp 2458676.495671443352
(2019-Jul-11.99567144)
4.7433e-05 TDB
period 1592.103184127336
4.36
8.4818e-06
2.322e-08
d
yr
n .22611599775006 1.2046e-09 deg/d
Q 3.155676776921343 1.1208e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2235  
   data-arc span      35541 days (97.31 yr)  
   first obs. used      1923-07-12  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43965  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:23:35  

Additional Information
 Earth MOID = 1.18263 au 
 Jupiter MOID = 2.07856 au 
 T_jup = 3.335 
[ 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 12.6   n/a MPO492761  
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 16.241 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2019) Minor Planet Bull. 46-4, in press.]
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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