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74990 (1999 TO264)
Classification: Main-belt Asteroid          SPK-ID: 2074990
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09511383426829707 3.4993e-08  
a 2.399572789064994 1.4021e-08 au
q 2.171340220491151 8.6623e-08 au
i 7.452461410355797 5.2243e-06 deg
node 50.89079014447388 3.1861e-05 deg
peri 236.6415322092806 4.6929e-05 deg
M 277.039448998627 3.8489e-05 deg
tp 2459313.373259462067
(2021-Apr-08.87325946)
0.00014661 TDB
period 1357.68593683135
3.72
1.19e-05
3.258e-08
d
yr
n .2651570515933824 2.3241e-09 deg/d
Q 2.627805357638838 1.5355e-08 au
  Orbit Determination Parameters
   # obs. used (total)      775  
   data-arc span      8066 days (22.08 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51331  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:41:32  

Additional Information
 Earth MOID = 1.16546 au 
 Jupiter MOID = 2.48888 au 
 T_jup = 3.509 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO266276  
diameter diameter 1.911 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.231   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74990 (1999 TO264)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TO264 = 1998 HA90 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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