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20601 (1999 RD197)
Classification: Main-belt Asteroid          SPK-ID: 2020601
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2966519690299951 4.1136e-08  
a 2.636803961717016 1.3134e-08 au
q 1.854590874527571 1.1394e-07 au
i 6.711564772548427 4.2434e-06 deg
node 312.2485613573267 2.9732e-05 deg
peri .5970430842825304 3.037e-05 deg
M 321.5867265012391 5.2763e-06 deg
tp 2459167.376048835532
(2020-Nov-13.87604884)
2.3229e-05 TDB
period 1563.922366125071
4.28
1.1685e-05
3.199e-08
d
yr
n .2301904543330828 1.7199e-09 deg/d
Q 3.41901704890646 1.703e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1613  
   data-arc span      12475 days (34.15 yr)  
   first obs. used      1986-08-12  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51704  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:51  

Additional Information
 Earth MOID = .840533 au 
 Jupiter MOID = 1.88521 au 
 T_jup = 3.324 
[ 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 13.9   n/a MPO384931  
rotation period rot_per 3.343 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:
[Polishook, D.; Ofek, E.O.; Waszczak, A.; Kulkarni, S.R.; et al. (2012). Mon. Not. Royal Ast. Soc. 421, 2094-2108.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

20601 (1999 RD197)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RD197 = 1986 PN1 = 2000 AU145 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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