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972 Cohnia (A922 BD)
Classification: Main-belt Asteroid          SPK-ID: 2000972
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2354521172639726 3.61e-08  
a 3.055230283473244 1.1024e-08 au
q 2.335869844500462 1.1052e-07 au
i 8.372177099983686 3.5643e-06 deg
node 281.5238459962728 2.7756e-05 deg
peri 93.59481174526236 2.8666e-05 deg
M 192.6812477767884 9.3465e-06 deg
tp 2459907.080698405709
(2022-Nov-23.58069841)
5.3667e-05 TDB
period 1950.582628004914
5.34
1.0557e-05
2.89e-08
d
yr
n .1845602410435766 9.989e-10 deg/d
Q 3.774590722446027 1.362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3140  
   data-arc span      41832 days (114.53 yr)  
   first obs. used      1906-01-22  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39412  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:25:48  

Additional Information
 Earth MOID = 1.35551 au 
 Jupiter MOID = 1.85193 au 
 T_jup = 3.177 
[ 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 9.6   n/a MPO394999  
diameter diameter 77.827 km 0.418 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.472 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Buchheim, R.K.; Roy, R.; Behrend, R. (2007) Minor Planet Bull. 34, 13-14.]
geometric albedo albedo 0.049   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

972 Cohnia (A922 BD)          Discovered 1922-Jan-18 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A922 BD = 1926 XC = A906 BB = A912 EA = A917 DC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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