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79142 (1991 VR2)
Classification: Main-belt Asteroid          SPK-ID: 2079142
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2651639241080322 5.3528e-08  
a 2.299260222548393 8.9063e-09 au
q 1.689579359391954 1.2234e-07 au
i 23.30427567556334 5.3614e-06 deg
node 45.23975563182152 1.0015e-05 deg
peri 275.2361186405575 2.108e-05 deg
M 234.5341366962964 2.4636e-05 deg
tp 2459840.316755699348
(2022-Sep-17.81675570)
8.8473e-05 TDB
period 1273.446241429152
3.49
7.3991e-06
2.026e-08
d
yr
n .2826974459447791 1.6426e-09 deg/d
Q 2.908941085704832 1.1268e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1227  
   data-arc span      10818 days (29.62 yr)  
   first obs. used      1991-10-10  
   last obs. used      2021-05-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50149  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:01:49  

Additional Information
 Earth MOID = .849673 au 
 Jupiter MOID = 2.75352 au 
 T_jup = 3.440 
[ 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 14.99   n/a MPCxxxxx  
diameter diameter 2.738 km 0.287 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.215   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

79142 (1991 VR2)          Discovered 1991-Nov-01 by Helin, E. F. at Palomar
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

Alternate Designations
 1991 VR2 = 1998 UF20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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