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JPL Small-Body Database Browser
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91330 (1999 HM2)
Classification: Main-belt Asteroid          SPK-ID: 2091330
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1099859390219109 3.5434e-08  
a 2.295147466640607 9.0379e-09 au
q 2.04271351732838 8.3278e-08 au
i 6.844360324115715 4.538e-06 deg
node 47.05385754890944 3.5416e-05 deg
peri 54.45000486738913 4.4904e-05 deg
M 111.0281331842077 2.4991e-05 deg
tp 2458608.807860625281
(2019-May-05.30786063)
8.8225e-05 TDB
period 1270.030992423779
3.48
7.5017e-06
2.054e-08
d
yr
n .283457649575119 1.6743e-09 deg/d
Q 2.547581415952834 1.0032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      987  
   data-arc span      7760 days (21.25 yr)  
   first obs. used      1997-10-30  
   last obs. used      2019-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55455  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:28:54  

Additional Information
 Earth MOID = 1.06805 au 
 Jupiter MOID = 2.58888 au 
 T_jup = 3.578 
[ 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 15.8   n/a MPO366275  

91330 (1999 HM2)          Discovered 1999-Apr-20 by Klet at Klet
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 HM2 = 2001 XP23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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