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18251 (3207 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018251
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09351309626330678 5.1584e-08  
a 2.248695137144692 7.6814e-09 au
q 2.03841269231805 1.16e-07 au
i 7.070696279313005 6.386e-06 deg
node 38.24505558412307 3.3573e-05 deg
peri 115.6432938933426 4.8687e-05 deg
M 157.9416474193924 3.3237e-05 deg
tp 2458460.133445620508
(2018-Dec-07.63344562)
0.00011355 TDB
period 1231.669814485752
3.37
6.311e-06
1.728e-08
d
yr
n .2922861271470776 1.4977e-09 deg/d
Q 2.458977581971333 8.3998e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1126  
   data-arc span      16670 days (45.64 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52238  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:35:25  

Additional Information
 Earth MOID = 1.05872 au 
 Jupiter MOID = 2.53225 au 
 T_jup = 3.613 
[ 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 15.2   n/a MPO474008  
diameter diameter 2.685 km 0.406 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.269   0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18251 (3207 T-2)          Discovered 1973-Sep-30 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 3207 T-2 = 1997 WH30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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