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249249 (2008 RA106)
Classification: Main-belt Asteroid          SPK-ID: 2249249
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2038159958610499 6.0643e-08  
a 2.612703110520928 2.0772e-08 au
q 2.080192424160842 1.6528e-07 au
i 11.72513983963651 7.0924e-06 deg
node 25.26592007510382 2.4475e-05 deg
peri 301.4745249897201 2.7546e-05 deg
M 5.186511686830451 1.4617e-05 deg
tp 2459178.276810968581
(2020-Nov-24.77681097)
6.251e-05 TDB
period 1542.529648901627
4.22
1.8396e-05
5.037e-08
d
yr
n .2333828722555456 2.7833e-09 deg/d
Q 3.145213796881014 2.5006e-08 au
  Orbit Determination Parameters
   # obs. used (total)      420  
   data-arc span      10511 days (28.78 yr)  
   first obs. used      1991-10-11  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57754  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 02:06:44  

Additional Information
 Earth MOID = 1.09556 au 
 Jupiter MOID = 2.32239 au 
 T_jup = 3.350 
[ 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 15.55   n/a E2021B55  
diameter diameter 4.061 km 1.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 0.9 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:
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.074   0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249249 (2008 RA106)          Discovered 2008-Sep-06 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 2008 RA106 = 1991 TK11 = 2004 XW164 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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