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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2308027235884594 2.7898e-08  
a 2.310174220451708 6.8047e-09 au
q 1.776979718407607 6.4397e-08 au
i 2.580418880143446 4.5494e-06 deg
node 199.2922360911034 7.5984e-05 deg
peri 221.4263870325042 7.6787e-05 deg
M 342.3389526217285 1.1607e-05 deg
tp 2459459.418662426788
(2021-Sep-01.91866243)
4.1483e-05 TDB
period 1282.52407620575
3.51
5.6666e-06
1.551e-08
d
yr
n .2806964849073498 1.2402e-09 deg/d
Q 2.843368722495808 8.3752e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1265  
   data-arc span      11610 days (31.79 yr)  
   first obs. used      1989-10-03  
   last obs. used      2021-07-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53609  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:56:32  

Additional Information
 Earth MOID = .790269 au 
 Jupiter MOID = 2.4992 au 
 T_jup = 3.548 
[ 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 15.71   n/a MPCxxxxx  
diameter diameter 1.794 km 0.365 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.346   0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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