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74658 (1999 RT89)
Classification: Main-belt Asteroid          SPK-ID: 2074658
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .214864863334828 3.4692e-08  
a 2.3799477300363 1.4479e-08 au
q 1.868580586278016 8.3873e-08 au
i 2.84201989228183 4.4676e-06 deg
node 51.9415783058108 8.7832e-05 deg
peri 245.2506546595844 8.9926e-05 deg
M 270.7935392856817 2.6778e-05 deg
tp 2459332.809964043459
(2021-Apr-28.30996404)
0.00010183 TDB
period 1341.064157211245
3.67
1.2238e-05
3.351e-08
d
yr
n .2684435327453857 2.4497e-09 deg/d
Q 2.891314873794584 1.759e-08 au
  Orbit Determination Parameters
   # obs. used (total)      558  
   data-arc span      10590 days (28.99 yr)  
   first obs. used      1991-04-21  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59462  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:07:33  

Additional Information
 Earth MOID = .854942 au 
 Jupiter MOID = 2.32675 au 
 T_jup = 3.506 
[ 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 16.2   n/a MPO453160  
diameter diameter 1.301 km 0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.379   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74658 (1999 RT89)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RT89 = 1999 TZ88 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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