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2991 Bilbo (1982 HV)
Classification: Main-belt Asteroid          SPK-ID: 2002991
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2212118654787012 5.5824e-08  
a 2.337388595591713 1.5525e-08 AU
q 1.820330504012229 1.343e-07 AU
i 5.151274681460852 5.5568e-06 deg
node 96.64619356439975 6.3966e-05 deg
peri 198.1978338345204 6.5248e-05 deg
M 349.3231113915271 1.2832e-05 deg
tp 2457039.211234303565
(2015-Jan-16.71123430)
4.6567e-05 JED
period 1305.253324290017
3.57
1.3004e-05
3.56e-08
d
yr
n .2758085295019796 2.7479e-09 deg/d
Q 2.854446687171198 1.8959e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1136  
   data-arc span      14292 days (39.13 yr)  
   first obs. used      1975-05-10  
   last obs. used      2014-06-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4994  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:45:32  

Additional Information
 Earth MOID = .806319 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 13.6 mag n/a MPO302079  
rotation period rot_per 4.0637 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/astero id/lightcurves.htm]

2991 Bilbo (1982 HV)          Discovered 1982-Apr-21 by Watt, M. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1982 HV = 1975 JC = 1979 SY3 = 1982 KB2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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