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7980 Senkevich (1978 TD2)
Classification: Main-belt Asteroid          SPK-ID: 2007980
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07943585246517082 3.252e-08  
a 2.817111776982972 1.019e-08 au
q 2.593332101488658 9.4012e-08 au
i 1.636677899612473 3.5445e-06 deg
node 2.506796459654161 0.00010964 deg
peri 357.3869815101788 0.00011152 deg
M 27.67823984258571 1.9915e-05 deg
tp 2459263.717600265840
(2021-Feb-18.21760027)
9.5516e-05 TDB
period 1727.048547023207
4.73
9.371e-06
2.566e-08
d
yr
n .2084481068123458 1.131e-09 deg/d
Q 3.040891452477287 1.1e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2259  
   data-arc span      15627 days (42.78 yr)  
   first obs. used      1978-10-03  
   last obs. used      2021-07-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5031  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 12:20:17  

Additional Information
 Earth MOID = 1.58887 au 
 Jupiter MOID = 2.33581 au 
 T_jup = 3.313 
[ 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 13.66   n/a E2021B10  
diameter diameter 4.323 km 0.490 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.39 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.]
geometric albedo albedo 0.413   0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7980 Senkevich           Discovered 1978 Oct. 3 by N. S. Chernykh at the Crimean Astrophysical Observatory.
Yurij Aleksandrovich Senkevich (b. 1937) is a scientist at the Institute of Medical and Biological Problems of the Russian Academy of Sciences. He prepared space biological experiments, worked at the Antarctic station "Vostok", took part in three of Thor Heyerdahl's expeditions and is a popular television journalist.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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