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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .120318057232895 6.2047e-08  
a 2.370646529176384 1.3463e-08 AU
q 2.085414944399976 1.4808e-07 AU
i 5.829841706764047 6.1158e-06 deg
node 216.5154407641605 4.7608e-05 deg
peri 171.4721705696077 5.1945e-05 deg
M 109.0096623155021 2.2723e-05 deg
tp 2456596.797790250529
(2013-Oct-31.29779025)
8.2892e-05 JED
period 1333.210216624458
3.65
1.1357e-05
3.109e-08
d
yr
n .2700249334358392 2.3002e-09 deg/d
Q 2.655878113952792 1.5083e-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 = 1.09022 AU 
 T_jup = 3.528 
[ 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. 2015-July); 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. (2015) Astron. J., in press.]

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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