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91439 (1999 RD12)
Classification: Main-belt Asteroid          SPK-ID: 2091439
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .243547730276035 4.4631e-08  
a 2.775992793604084 1.5569e-08 au
q 2.099906049459179 1.2128e-07 au
i 15.5820992858753 4.7459e-06 deg
node 165.817842104908 1.7084e-05 deg
peri 177.9130113885724 1.9999e-05 deg
M 254.6764254460508 1.3225e-05 deg
tp 2459890.752662800163
(2022-Nov-07.25266280)
6.4734e-05 TDB
period 1689.374476337379
4.63
1.4212e-05
3.891e-08
d
yr
n .2130966254329189 1.7927e-09 deg/d
Q 3.452079537748988 1.9361e-08 au
  Orbit Determination Parameters
   # obs. used (total)      534  
   data-arc span      7977 days (21.84 yr)  
   first obs. used      1999-08-08  
   last obs. used      2021-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50518  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:34  

Additional Information
 Earth MOID = 1.09174 au 
 Jupiter MOID = 1.97915 au 
 T_jup = 3.239 
[ 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 15.42   n/a MPO637243  
rotation period rot_per 70.4823 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

91439 (1999 RD12)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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