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952 Caia (A916 US)
Classification: Main-belt Asteroid          SPK-ID: 2000952
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2436253840943598 3.8808e-08  
a 2.991385221698834 1.1493e-08 au
q 2.262607848088264 1.169e-07 au
i 9.990601115985845 4.6565e-06 deg
node 18.41898079495676 2.0526e-05 deg
peri 356.4947029110473 2.1715e-05 deg
M 28.04249934607143 7.4909e-06 deg
tp 2458853.295475007404
(2020-Jan-04.79547501)
3.9231e-05 TDB
period 1889.761263550097
5.17
1.0891e-05
2.982e-08
d
yr
n .1905002536265907 1.0979e-09 deg/d
Q 3.720162595309404 1.4293e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3015  
   data-arc span      37990 days (104.01 yr)  
   first obs. used      1916-10-27  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4219  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:01  

Additional Information
 Earth MOID = 1.26397 au 
 Jupiter MOID = 1.74345 au 
 T_jup = 3.188 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.3   n/a MPO435704  
diameter diameter 88.692 km 0.422 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.51 h n/a LCDB (Rev. 2019-August); 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:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Stanzel, R.; Schober, H.J. (1980) Astron. Astrophys. Suppl. Ser. 39, 3-5.]
geometric albedo albedo 0.047   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

952 Caia (A916 US)          Discovered 1916-Oct-27 by Neujmin, G. at Simeis
Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A916 US = 1973 WH = A908 EB = A919 GB = A921 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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