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137184 (1999 JG63)
Classification: Mars-crossing Asteroid          SPK-ID: 2137184
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5580047310899143 3.2515e-08  
a 2.958464802833215 2.1467e-08 au
q 1.30762744608929 9.2717e-08 au
i 8.018429575323475 5.2634e-06 deg
node 50.24650933451629 2.5754e-05 deg
peri 248.1498942283965 2.7271e-05 deg
M 63.9936159926054 1.6703e-05 deg
tp 2458870.105973127744
(2020-Jan-21.60597313)
8.316e-05 TDB
period 1858.651801888431
5.09
2.023e-05
5.539e-08
d
yr
n .1936887800255175 2.1081e-09 deg/d
Q 4.60930215957714 3.3446e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1398  
   data-arc span      8025 days (21.97 yr)  
   first obs. used      1999-02-23  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49282  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:20:48  

Additional Information
 Earth MOID = .324971 au 
 Jupiter MOID = .879282 au 
 T_jup = 2.998 
[ 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 14.12   n/a E2021B55  
diameter diameter 4.8 km 1.0 Fernandez et al. (2005) Astron.J. 130:308-318  
rotation period rot_per 4.868 h n/a LCDB (Rev. 2020-October); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.193   0.077 Fernandez et al. (2005) Astron.J. 130:308-318  

137184 (1999 JG63)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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