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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09489794336833252 3.8555e-08  
a 2.40022769755204 1.6142e-08 au
q 2.172451025438643 9.2274e-08 au
i 7.452454981647278 5.8105e-06 deg
node 50.89899881893689 3.2382e-05 deg
peri 236.493110629521 4.7396e-05 deg
M 171.1433763777501 3.8338e-05 deg
tp 2457954.794201748888
(2017-Jul-20.29420175)
0.00014155 TDB
period 1358.241798720415
3.72
1.3701e-05
3.751e-08
d
yr
n .2650485357902783 2.6737e-09 deg/d
Q 2.628004369665437 1.7674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      617  
   data-arc span      7865 days (21.53 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54034  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 06:50:13  

Additional Information
 Earth MOID = 1.16595 au 
 Jupiter MOID = 2.48781 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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