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91104 (1998 HH25)
Classification: Main-belt Asteroid          SPK-ID: 2091104
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0512276433052113 4.715e-08  
a 2.789926714955988 2.3864e-08 au
q 2.647005344354542 1.3302e-07 au
i 6.400162075550035 5.9376e-06 deg
node 42.16025732173084 3.805e-05 deg
peri 301.4323967594219 6.5306e-05 deg
M 123.8864945332472 5.4315e-05 deg
tp 2458414.754334178136
(2018-Oct-23.25433418)
0.00025607 TDB
period 1702.109987778212
4.66
2.1839e-05
5.979e-08
d
yr
n .2115021958539313 2.7137e-09 deg/d
Q 2.932848085557433 2.5086e-08 au
  Orbit Determination Parameters
   # obs. used (total)      445  
   data-arc span      7931 days (21.71 yr)  
   first obs. used      1998-04-18  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61572  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:00:12  

Additional Information
 Earth MOID = 1.64684 au 
 Jupiter MOID = 2.27426 au 
 T_jup = 3.318 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO453350  

91104 (1998 HH25)          Discovered 1998-Apr-18 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 HH25 = 2004 QE5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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