Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .220764249115417 1.2957e-08  
a 2.337782587419323 7.3486e-09 au
q 1.821683769912599 2.95e-08 au
i 5.151605183097119 6.3465e-07 deg
node 96.60685622597718 1.3936e-05 deg
peri 198.1464661240299 1.6655e-05 deg
M 236.1171354937331 6.4709e-06 deg
tp 2459649.776129063363
(2022-Mar-11.27612906)
2.4826e-05 TDB
period 1305.583359792496
3.57
6.156e-06
1.685e-08
d
yr
n .2757388084796185 1.3001e-09 deg/d
Q 2.853881404926047 8.971e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2265  
   data-arc span      16755 days (45.87 yr)  
   first obs. used      1975-05-10  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48712  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:39:45  

Additional Information
 Earth MOID = .804482 au 
 Jupiter MOID = 2.34946 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 13.68   n/a MPCxxxxx  
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. 2020-October); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-13 23:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin