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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09392255655123154 4.4987e-08  
a 2.247860628352823 6.7919e-09 au
q 2.036735811367068 9.947e-08 au
i 7.071655732750715 4.5813e-06 deg
node 38.22903348242791 3.0344e-05 deg
peri 115.6615507217518 3.7482e-05 deg
M 216.4172972941957 2.3156e-05 deg
tp 2459691.466795052352
(2022-Apr-21.96679505)
8.0232e-05 TDB
period 1230.984254287211
3.37
5.5791e-06
1.527e-08
d
yr
n .2924489072432971 1.3255e-09 deg/d
Q 2.458985445338578 7.4299e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1449  
   data-arc span      17282 days (47.32 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51292  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:43  

Additional Information
 Earth MOID = 1.05681 au 
 Jupiter MOID = 2.53136 au 
 T_jup = 3.614 
[ 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 15.12   n/a E2021B10  
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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