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2085 Henan (1965 YA)
Classification: Main-belt Asteroid          SPK-ID: 2002085
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08645124125675557 2.9867e-08  
a 2.697875730903875 1.0566e-08 au
q 2.464641025210759 8.1753e-08 au
i 3.83466909099493 3.5429e-06 deg
node 118.1357566352009 5.218e-05 deg
peri 294.0529806655048 5.6549e-05 deg
M 139.1380937669124 2.1795e-05 deg
tp 2458374.931478039006
9.7399e-05 TDB
period 1618.56945002586
n .2224186302257516 1.3066e-09 deg/d
Q 2.931110436596991 1.1479e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2830  
   data-arc span      25883 days (70.86 yr)  
   first obs. used      1949-03-24  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44715  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:12:17  

Additional Information
 Earth MOID = 1.47867 au 
 Jupiter MOID = 2.35001 au 
 T_jup = 3.360 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO431518  
diameter diameter 13.356 km 0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 24. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site,]
geometric albedo albedo 0.131   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B L   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2085 Henan           Discovered 1965 Dec. 20 at the Purple Mountain Observatory.
Named for the province situated in the lower stretch of the Yellow River, the cradle of civilization in ancient China.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5184Last Updated: 2006-03-21

Alternate Designations
 1965 YA = 1933 RE = 1938 WR = 1949 FL = 1949 FP1 = 1962 CL = 1963 KA = 1969 VA1 = 1971 BG1 = 1972 LX = 1973 QX1 = 1976 GR7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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