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JPL Small-Body Database Browser
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46769 (1998 HJ2)
Classification: Main-belt Asteroid          SPK-ID: 2046769
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543779528790643 4.313e-08  
a 2.208087657674455 8.446e-09 au
q 1.867207605305145 9.3638e-08 au
i 3.531836690168277 4.3621e-06 deg
node 122.6223977636077 7.1264e-05 deg
peri 185.8797016115183 7.2586e-05 deg
M 181.3330396742767 1.4454e-05 deg
tp 2459595.291344837168
(2022-Jan-15.79134484)
4.9381e-05 TDB
period 1198.458202630272
3.28
6.8762e-06
1.883e-08
d
yr
n .3003859452168654 1.7235e-09 deg/d
Q 2.548967710043766 9.7499e-09 au
  Orbit Determination Parameters
   # obs. used (total)      816  
   data-arc span      7963 days (21.80 yr)  
   first obs. used      1998-03-29  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:34:32  

Additional Information
 Earth MOID = .852514 au 
 Jupiter MOID = 2.68367 au 
 T_jup = 3.641 
[ 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 16.0   n/a MPO452809  
rotation period rot_per 32.00 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

46769 (1998 HJ2)          Discovered 1998-Apr-19 by Spacewatch at Kitt Peak
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HJ2 = 1999 XV109 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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