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JPL Small-Body Database Browser
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249604 (1999 HM12)
Classification: Main-belt Asteroid          SPK-ID: 2249604
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3128274709871001 4.2936e-08  
a 2.627360696223884 1.4786e-08 au
q 1.80545009425326 1.104e-07 au
i 29.76958141973979 1.3299e-05 deg
node 10.37321959078322 8.3091e-06 deg
peri 108.0267974112978 2.3753e-05 deg
M 307.8253662913472 2.0786e-05 deg
tp 2458825.942028308071
(2019-Dec-08.44202831)
9.0958e-05 TDB
period 1555.528509200555
4.26
1.3131e-05
3.595e-08
d
yr
n .2314325953337993 1.9536e-09 deg/d
Q 3.449271298194508 1.9411e-08 au
  Orbit Determination Parameters
   # obs. used (total)      655  
   data-arc span      7531 days (20.62 yr)  
   first obs. used      1999-04-15  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54819  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 18:48:27  

Additional Information
 Earth MOID = .987325 au 
 Jupiter MOID = 2.09525 au 
 T_jup = 3.152 
[ 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 15.0   n/a MPO454851  

249604 (1999 HM12)          Discovered 1999-Apr-17 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Alternate Designations
 1999 HM12 = 2002 XB66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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