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8172 (1991 RP15)
Classification: Main-belt Asteroid          SPK-ID: 2008172
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491148599819291 5.7409e-08  
a 3.071638973453536 2.6303e-08 AU
q 2.613611958011976 1.8304e-07 AU
i 1.446892103132036 6.7686e-06 deg
node 47.58805267104348 0.00024851 deg
peri 16.1677465586022 0.00024939 deg
M 19.9210181201538 2.2748e-05 deg
tp 2456691.691528225410
(2014-Feb-03.19152823)
0.0001241 JED
period 1966.317665221311
5.38
2.5257e-05
6.915e-08
d
yr
n .1830833371267515 2.3517e-09 deg/d
Q 3.529665988895097 3.0226e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1047  
   data-arc span      14051 days (38.47 yr)  
   first obs. used      1975-10-03  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51825  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:39:15  

Additional Information
 Earth MOID = 1.62594 AU 
 T_jup = 3.213 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0 mag n/a MPO267740  

8172 (1991 RP15)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 RP15 = 1975 TK2 = 1975 VA2 = 1982 BE11 = 1986 TE18 = 1986 VO6 = 1988 CY6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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