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 ]  
85461 (1997 HP12)
Classification: Main-belt Asteroid          SPK-ID: 2085461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1802338997938099 5.0862e-08  
a 2.317282714835592 8.4917e-09 au
q 1.899629814215986 1.195e-07 au
i 3.589298039123606 5.2789e-06 deg
node 207.2376657016152 6.4023e-05 deg
peri 347.6249540057328 6.4901e-05 deg
M 270.0464625787175 1.1538e-05 deg
tp 2459522.445757114937
(2021-Nov-03.94575711)
4.2217e-05 TDB
period 1288.44819096526
3.53
7.0823e-06
1.939e-08
d
yr
n .2794058795102196 1.5358e-09 deg/d
Q 2.734935615455198 1.0022e-08 au
  Orbit Determination Parameters
   # obs. used (total)      456  
   data-arc span      8688 days (23.79 yr)  
   first obs. used      1997-04-06  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54408  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:13:09  

Additional Information
 Earth MOID = .897971 au 
 Jupiter MOID = 2.22279 au 
 T_jup = 3.556 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.59   n/a MPCxxxxx  

85461 (1997 HP12)          Discovered 1997-Apr-30 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1997 HP12 = 2002 VL91 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-24 07:50 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin