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20507 (1999 RU19)
Classification: Main-belt Asteroid          SPK-ID: 2020507
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183157161119027 3.6787e-08  
a 2.189925355408033 7.297e-09 au
q 1.930822768751319 8.0755e-08 au
i .07850305049893679 4.0905e-06 deg
node 99.33026532979497 0.0029419 deg
peri 132.0823218666285 0.0029419 deg
M 309.7957321721843 2.3012e-05 deg
tp 2459365.574705757807
(2021-May-31.07470576)
7.6019e-05 TDB
period 1183.702036580347
3.24
5.9163e-06
1.62e-08
d
yr
n .3041305910396344 1.5201e-09 deg/d
Q 2.449027942064748 8.1604e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1485  
   data-arc span      8914 days (24.41 yr)  
   first obs. used      1996-10-16  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49758  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:45  

Additional Information
 Earth MOID = .918742 au 
 Jupiter MOID = 2.53508 au 
 T_jup = 3.664 
[ 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 14.94   n/a E2021B10  
rotation period rot_per 10.283 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

20507 (1999 RU19)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RU19 = 1998 CD5 = 1998 EZ18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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