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91790 (1999 TF222)
Classification: Main-belt Asteroid          SPK-ID: 2091790
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06066092572768098 4.0484e-08  
a 3.125145849911981 2.1406e-08 au
q 2.9355716096223 1.2304e-07 au
i 8.360653230275759 5.0574e-06 deg
node 225.3440802589593 2.6079e-05 deg
peri 213.391161920335 4.6861e-05 deg
M 204.5880635740129 3.9312e-05 deg
tp 2459871.635543202743
(2022-Oct-19.13554320)
0.0002225 TDB
period 2017.919619078549
5.52
2.0733e-05
5.676e-08
d
yr
n .1784015560364037 1.8329e-09 deg/d
Q 3.314720090201662 2.2704e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1028  
   data-arc span      8484 days (23.23 yr)  
   first obs. used      1997-04-30  
   last obs. used      2020-07-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50493  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:38:29  

Additional Information
 Earth MOID = 1.95462 au 
 Jupiter MOID = 1.94316 au 
 T_jup = 3.196 
[ 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 14.1   n/a MPO348077  
diameter diameter 5.972 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 0.92 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.136   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91790 (1999 TF222)          Discovered 1999-Oct-02 by LONEOS at Anderson Mesa
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 TF222 = 1997 HQ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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