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7946 (1991 RV13)
Classification: Main-belt Asteroid          SPK-ID: 2007946
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1209043451750551 6.2097e-08  
a 2.369568005991437 1.3309e-08 au
q 2.083076937879281 1.4819e-07 au
i 5.832643838592269 6.1183e-06 deg
node 216.4873441685708 4.7581e-05 deg
peri 171.3169799011317 5.1873e-05 deg
M 271.3090318999687 2.3195e-05 deg
tp 2457928.730615819471
(2017-Jun-24.23061582)
8.7111e-05 JED
period 1332.30050619966
3.65
1.1224e-05
3.073e-08
d
yr
n .2702093096300678 2.2764e-09 deg/d
Q 2.656059074103593 1.4918e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1264  
   data-arc span      11131 days (30.48 yr)  
   first obs. used      1984-11-18  
   last obs. used      2015-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51424  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:59:59  

Additional Information
 Earth MOID = 1.08666 au 
 Jupiter MOID = 2.77313 au 
 T_jup = 3.529 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO324381  
rotation period rot_per 51.3427 h n/a LCDB (Rev. 2016-February); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

7946 (1991 RV13)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 RV13 = 1984 WM 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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