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85610 (1998 HC11)
Classification: Outer Main-belt Asteroid          SPK-ID: 2085610
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09591623389172298 5.8735e-08  
a 3.230618047302612 3.5064e-08 au
q 2.920749331062713 2.0046e-07 au
i 6.390846425646873 6.0183e-06 deg
node 76.22833370273992 5.6346e-05 deg
peri 157.9542794185439 6.7785e-05 deg
M 272.8322409013729 4.1715e-05 deg
tp 2459514.047039230408
(2021-Oct-26.54703923)
0.00025086 TDB
period 2120.932510307687
5.81
3.453e-05
9.454e-08
d
yr
n .1697366598184561 2.7634e-09 deg/d
Q 3.540486763542511 3.8427e-08 au
  Orbit Determination Parameters
   # obs. used (total)      335  
   data-arc span      7962 days (21.80 yr)  
   first obs. used      1998-04-17  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63443  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:35:15  

Additional Information
 Earth MOID = 1.91042 au 
 Jupiter MOID = 1.46312 au 
 T_jup = 3.170 
[ 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 15.2   n/a MPO344891  
diameter diameter 5.699 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.050   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85610 (1998 HC11)          Discovered 1998-Apr-17 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 HC11 = 2001 YM54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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