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JPL Small-Body Database Browser
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91432 (1999 RF1)
Classification: Main-belt Asteroid          SPK-ID: 2091432
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04509645931336907 4.2953e-08  
a 2.786470643544452 1.9245e-08 au
q 2.660810683539952 1.1637e-07 au
i 5.407042946840561 5.2255e-06 deg
node 125.0193823477521 5.3899e-05 deg
peri 319.5072490225652 9.2719e-05 deg
M 66.88254791205399 7.2321e-05 deg
tp 2458684.861156549398
(2019-Jul-20.36115655)
0.00034186 TDB
period 1698.94818887032
4.65
1.7601e-05
4.819e-08
d
yr
n .211895808452743 2.1952e-09 deg/d
Q 2.912130603548952 2.0113e-08 au
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      7458 days (20.42 yr)  
   first obs. used      1999-09-04  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52309  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:29:54  

Additional Information
 Earth MOID = 1.6799 au 
 Jupiter MOID = 2.18143 au 
 T_jup = 3.323 
[ 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 15.1   n/a MPO453354  
diameter diameter 6.263 km 0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.6 h n/a LCDB (Rev. 2019-August); 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. (2011) Minor Planet Bull. 38, 198-199.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.049   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91432 (1999 RF1)          Discovered 1999-Sep-04 by Comba, P. G. at Prescott
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RF1 = 2002 GJ46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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