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18280 (4245 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2018280
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1306202753665564 3.8109e-08  
a 2.421413897464833 8.5336e-09 au
q 2.10512814740157 9.1649e-08 au
i 7.536620970736702 4.0428e-06 deg
node 62.0941027947004 2.2946e-05 deg
peri 9.091220048544729 2.5682e-05 deg
M 172.6931215873792 1.2108e-05 deg
tp 2458736.301532377630
(2019-Sep-09.80153238)
4.5212e-05 TDB
period 1376.264706778123
3.77
7.2754e-06
1.992e-08
d
yr
n .2615775862208738 1.3828e-09 deg/d
Q 2.737699647528096 9.6483e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1791  
   data-arc span      15972 days (43.73 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46117  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:35:28  

Additional Information
 Earth MOID = 1.11961 au 
 Jupiter MOID = 2.53342 au 
 T_jup = 3.490 
[ 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 14.32   n/a MPO614063  
rotation period rot_per 3.808 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[McNeill, A.; Fitzsimmons, A.; Jedicke, R.; Lacerda, P.; et al. (2018) Astron. J. 156, A282.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

18280 (4245 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 4245 T-3 = 1981 WC2 = 1998 FC78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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