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JPL Small-Body Database Browser
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7943 (1991 PQ12)
Classification: Main-belt Asteroid          SPK-ID: 2007943
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1233196773863383 3.0692e-08  
a 3.145314410186671 1.657e-08 au
q 2.757435251843849 9.524e-08 au
i 1.088858370970763 4.2358e-06 deg
node 173.4159019354155 0.00018024 deg
peri 84.50875617437218 0.00018108 deg
M 47.27058902227525 1.6914e-05 deg
tp 2458332.963502569774
(2018-Aug-02.46350257)
9.5739e-05 TDB
period 2037.485486578047
5.58
1.61e-05
4.408e-08
d
yr
n .1766883751425486 1.3962e-09 deg/d
Q 3.533193568529492 1.8613e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2168  
   data-arc span      10344 days (28.32 yr)  
   first obs. used      1991-08-05  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47181  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:33:42  

Additional Information
 Earth MOID = 1.74228 au 
 Jupiter MOID = 1.51868 au 
 T_jup = 3.197 
[ 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 12.8   n/a MPO502228  
diameter diameter 10.854 km 0.371 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.137   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7943 (1991 PQ12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PQ12 = 1995 DF1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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