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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 ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1542683171540347 4.341e-08  
a 2.207866358842715 8.4551e-09 au
q 1.867262531163043 9.4346e-08 au
i 3.531569632767833 4.4189e-06 deg
node 122.6261434749714 7.2405e-05 deg
peri 185.8008653777751 7.3761e-05 deg
M 61.27114369192711 1.4371e-05 deg
tp 2458396.555927952836
(2018-Oct-05.05592795)
4.752e-05 TDB
period 1198.278039432981
3.28
6.8833e-06
1.885e-08
d
yr
n .3004311087686712 1.7258e-09 deg/d
Q 2.548470186522386 9.7595e-09 au
  Orbit Determination Parameters
   # obs. used (total)      797  
   data-arc span      7436 days (20.36 yr)  
   first obs. used      1998-03-29  
   last obs. used      2018-08-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59041  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:39:12  

Additional Information
 Earth MOID = .851756 au 
 Jupiter MOID = 2.68214 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-January); 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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