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85176 (1990 RP2)
Classification: Main-belt Asteroid          SPK-ID: 2085176
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 .1876986783625592 2.8643e-08  
a 2.289065738463393 8.176e-09 au
q 1.859411124668799 6.6633e-08 au
i 2.802803963121051 3.65e-06 deg
node 242.1098542918468 7.1919e-05 deg
peri 116.8510189967414 7.2749e-05 deg
M 204.6900554752137 1.1612e-05 deg
tp 2459546.235981134009
(2021-Nov-27.73598113)
4.2211e-05 TDB
period 1264.986307279819
3.46
6.7774e-06
1.856e-08
d
yr
n .2845880606993533 1.5247e-09 deg/d
Q 2.718720352257988 9.7107e-09 au
  Orbit Determination Parameters
   # obs. used (total)      906  
   data-arc span      10816 days (29.61 yr)  
   first obs. used      1990-09-15  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50362  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:34:08  

Additional Information
 Earth MOID = .857954 au 
 Jupiter MOID = 2.74111 au 
 T_jup = 3.575 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456936.5 (2014-Oct-06.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1875788442092978 2.8699e-08  
q 1.860133027593732 6.6796e-08 au
tp 2457013.672926155453
(2014-Dec-22.17292616)
3.7107e-05 TDB
node 242.2744486279001 7.2068e-05 deg
peri 116.2727170577685 7.2889e-05 deg
i 2.798608252731037 3.6478e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      906  
   data-arc span      10816 days (29.61 yr)  
   first obs. used      1990-09-15  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50362  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:34:08  

Additional Information
 Jupiter MOID = 2.74111 au 
 T_jup = 3.575 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.23616353510742E-16 -1.907527733445427E-15 -1.178842056183821E-13 6.826970655660598E-15 -3.524648923315196E-14 -5.262289731170627E-17
q -1.907527733445427E-15 4.461656495704532E-15 3.269603886092991E-13 -1.618902766367442E-14 9.542666241685284E-14 2.111970432928215E-16
tp -1.178842056183821E-13 3.269603886092991E-13 1.376961044602473E-9 -1.382048141186922E-11 4.151884253133306E-10 6.008549418673962E-13
node 6.826970655660598E-15 -1.618902766367442E-14 -1.382048141186922E-11 5.19384741343562E-9 -5.191416727543929E-9 3.613307647953658E-11
peri -3.524648923315196E-14 9.542666241685284E-14 4.151884253133306E-10 -5.191416727543929E-9 5.312821817309868E-9 -3.5921383958477E-11
i -5.262289731170627E-17 2.111970432928215E-16 6.008549418673962E-13 3.613307647953658E-11 -3.5921383958477E-11 1.330628987210416E-11

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 15.8   n/a MPO453282  

85176 (1990 RP2)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1990 RP2 = 2001 XW190 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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