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12856 (1998 HH93)
Classification: Main-belt Asteroid          SPK-ID: 2012856
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07121784826136374 2.9048e-08  
a 2.18419880117142 6.5352e-09 au
q 2.028644862376941 6.3869e-08 au
i 2.413164026050354 4.8181e-06 deg
node 355.4883745609561 7.6437e-05 deg
peri 76.04447268074975 8.5127e-05 deg
M 323.3341282564865 3.7314e-05 deg
tp 2458720.587053142956
(2019-Aug-25.08705314)
0.00012235 TDB
period 1179.062083505823
3.23
5.2917e-06
1.449e-08
d
yr
n .3053274335899056 1.3703e-09 deg/d
Q 2.339752739965898 7.0007e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2028  
   data-arc span      20026 days (54.83 yr)  
   first obs. used      1965-01-01  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47697  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:38:59  

Additional Information
 Earth MOID = 1.04438 au 
 Jupiter MOID = 2.81066 au 
 T_jup = 3.674 
[ 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 13.8   n/a MPO416851  
diameter diameter 4.726 km 0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.262   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

12856 (1998 HH93)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HH93 = 1965 AG = 1983 TT = 1986 RM15 = A915 RE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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