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85156 (1987 RN1)
Classification: Main-belt Asteroid          SPK-ID: 2085156
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2373776086325815 3.1988e-08  
a 2.747607796542141 9.4854e-09 au
q 2.095387228338731 8.7869e-08 au
i 2.490960727932923 3.6495e-06 deg
node 149.0795272065176 8.7806e-05 deg
peri 222.0934316987018 8.8259e-05 deg
M 56.73411466905235 7.6155e-06 deg
tp 2458738.336444547409
(2019-Sep-11.83644455)
3.5155e-05 TDB
period 1663.529615531571
4.55
8.6143e-06
2.358e-08
d
yr
n .2164073285133334 1.1206e-09 deg/d
Q 3.399828364745551 1.1737e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1069  
   data-arc span      11823 days (32.37 yr)  
   first obs. used      1987-09-13  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50921  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:27:30  

Additional Information
 Earth MOID = 1.0961 au 
 Jupiter MOID = 2.06321 au 
 T_jup = 3.304 
[ 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 15.1   n/a MPO449529  
diameter diameter 4.656 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

85156 (1987 RN1)          Discovered 1987-Sep-13 by Debehogne, H. at La Silla
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1987 RN1 = 2001 QA201 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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