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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1803782301755154 5.4412e-08  
a 2.316852073761613 8.5355e-09 au
q 1.898942397118021 1.2733e-07 au
i 3.589754462526765 5.5652e-06 deg
node 207.2420141885029 6.555e-05 deg
peri 347.66685498 6.6427e-05 deg
M 214.1138802538729 1.1428e-05 deg
tp 2459522.484200675261
(2021-Nov-03.98420068)
4.2326e-05 TDB
period 1288.089042124809
3.53
7.1182e-06
1.949e-08
d
yr
n .2794837842934758 1.5445e-09 deg/d
Q 2.734761750405205 1.0075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      420  
   data-arc span      8234 days (22.54 yr)  
   first obs. used      1997-04-06  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57251  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:32:52  

Additional Information
 Earth MOID = .897972 au 
 Jupiter MOID = 2.22406 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 16.5   n/a MPO436373  

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 ]
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