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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1099859652181047 3.3444e-08  
a 2.295147466929429 8.0505e-09 au
q 2.042713457461308 7.7484e-08 au
i 6.844366043564697 4.5173e-06 deg
node 47.05387777780108 3.2493e-05 deg
peri 54.4499984189749 4.1125e-05 deg
M 111.028123533535 2.3589e-05 deg
tp 2458608.807894597605
(2019-May-05.30789460)
8.2911e-05 TDB
period 1270.03099266351
3.48
6.6822e-06
1.829e-08
d
yr
n .2834576495216133 1.4914e-09 deg/d
Q 2.54758147639755 8.9359e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1064  
   data-arc span      8215 days (22.49 yr)  
   first obs. used      1997-10-30  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54226  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:39:43  

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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