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85981 (1999 HS3)
Classification: Main-belt Asteroid          SPK-ID: 2085981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1441294148898823 4.5899e-08  
a 2.524688548409618 1.0415e-08 au
q 2.160806665148153 1.144e-07 au
i 14.6898982989186 4.7658e-06 deg
node 157.6209630003847 1.3434e-05 deg
peri 352.4794530250921 1.8831e-05 deg
M 224.765230307114 1.4593e-05 deg
tp 2459946.922282698305
(2023-Jan-02.42228270)
6.1175e-05 TDB
period 1465.244642493843
4.01
9.0667e-06
2.482e-08
d
yr
n .2456927598024046 1.5203e-09 deg/d
Q 2.888570431671083 1.1916e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1185  
   data-arc span      7904 days (21.64 yr)  
   first obs. used      1999-03-20  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50927  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:10:48  

Additional Information
 Earth MOID = 1.17286 au 
 Jupiter MOID = 2.1071 au 
 T_jup = 3.395 
[ 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 14.97   n/a MPCxxxxx  
diameter diameter 2.870 km 0.326 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85981 (1999 HS3)          Discovered 1999-Apr-18 by CSS at Catalina
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1999 HS3 = 1999 GK49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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