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91172 (1998 RG5)
Classification: Main-belt Asteroid          SPK-ID: 2091172
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07588734406616572 3.7746e-08  
a 3.174261341141482 2.8135e-08 au
q 2.93337507859035 1.2555e-07 au
i 9.731294984499273 5.7506e-06 deg
node 39.50973928229261 2.5254e-05 deg
peri 242.0751251010918 4.9112e-05 deg
M 16.479726111151 3.9742e-05 deg
tp 2458905.939461759681
(2020-Feb-26.43946176)
0.00022821 TDB
period 2065.677156095486
5.66
2.7463e-05
7.519e-08
d
yr
n .174276991415477 2.317e-09 deg/d
Q 3.415147603692615 3.027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      615  
   data-arc span      7988 days (21.87 yr)  
   first obs. used      1998-09-15  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5612  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:15:55  

Additional Information
 Earth MOID = 1.93344 au 
 Jupiter MOID = 1.70004 au 
 T_jup = 3.174 
[ 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 14.6   n/a MPO348072  
rotation period rot_per 21.7 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Molnar, L.; Pal, A.; Sarneczky, K.; Szabo, R.; et al. (2017) ArXiv:170606056v1]

91172 (1998 RG5)          Discovered 1998-Sep-15 by ODAS at Caussols
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 RG5 = 2002 JN56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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