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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2356336722391323 1.9564e-08  
a 3.054900762479674 1.0238e-08 au
q 2.335063277490463 6.3669e-08 au
i 8.372320969268118 1.1484e-06 deg
node 281.5215711784336 9.5849e-06 deg
peri 93.58498837238864 1.1012e-05 deg
M 229.6244202740925 5.7842e-06 deg
tp 2459906.797776411357
(2022-Nov-23.29777641)
3.3684e-05 TDB
period 1950.267067211837
5.34
9.8044e-06
2.684e-08
d
yr
n .1845901036080496 9.2797e-10 deg/d
Q 3.774738247468885 1.2651e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3241  
   data-arc span      42060 days (115.15 yr)  
   first obs. used      1906-01-22  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39721  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:03:25  

Additional Information
 Earth MOID = 1.35334 au 
 Jupiter MOID = 1.8529 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 9.64   n/a E2021B10  
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. 2020-October); Warner et al., 2009 Published Reference List:
[Buchheim, R.K.; Roy, R.; Behrend, R. (2007) Minor Planet Bull. 34, 13-14.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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