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2991 Bilbo (1982 HV)
Classification: Main-belt Asteroid          SPK-ID: 2002991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2207027453469994 3.2382e-08  
a 2.337567719384311 8.9679e-09 au
q 1.821660106281669 7.5376e-08 au
i 5.151825704900102 3.5749e-06 deg
node 96.60959870719294 4.336e-05 deg
peri 198.0460779303664 4.4141e-05 deg
M 70.81428221801171 1.0061e-05 deg
tp 2458343.718881988413
(2018-Aug-13.21888199)
3.5737e-05 TDB
period 1305.403367636746
3.57
7.5121e-06
2.057e-08
d
yr
n .2757768280096677 1.587e-09 deg/d
Q 2.853475332486953 1.0947e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1880  
   data-arc span      16281 days (44.57 yr)  
   first obs. used      1975-05-10  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50859  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:23:35  

Additional Information
 Earth MOID = .805716 au 
 Jupiter MOID = 2.34831 au 
 T_jup = 3.528 
[ 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 13.6   n/a MPO431530  
diameter diameter 7.818 km 0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.0637 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.115   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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