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21104 Sveshnikov (1992 PY)
Classification: Mars-crossing Asteroid          SPK-ID: 2021104
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2967638155733963 1.9101e-08  
a 2.34242826230664 1.0247e-08 au
q 1.647280313477561 4.5558e-08 au
i 21.35532347674964 1.1115e-06 deg
node 311.4606807346426 1.9295e-06 deg
peri 83.77466675292912 2.4593e-06 deg
M 283.3746499065659 5.3748e-06 deg
tp 2459479.219816173197
(2021-Sep-21.71981617)
2.1111e-05 TDB
period 1309.477003367698
3.59
8.5924e-06
2.352e-08
d
yr
n .274918917303745 1.8039e-09 deg/d
Q 3.037576211135719 1.3288e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1411  
   data-arc span      16860 days (46.16 yr)  
   first obs. used      1974-06-17  
   last obs. used      2020-08-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40648  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:39:22  

Additional Information
 Earth MOID = .794913 au 
 Jupiter MOID = 2.80487 au 
 T_jup = 3.415 
[ 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 13.81   n/a E2021B10  
diameter diameter 3.614 km 0.535 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 2.8406 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.446   0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

21104 Sveshnikov           Discovered 1992 Aug. 8 by E. W. Elst at Caussols.
Mikhail Leonidovich Sveshnikov (b. 1941) is a well-known expert in celestial mechanics and astrometry. He is Editor-in-Chief of the Russian Naval Astronomical Almanac. From 2001 to 2004, he headed the Laboratory of the astronomical yearbooks of the Institute of Applied Astronomy of the Russian Academy of Sciences.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110715/MPCPages.arcLast Updated: 2011-07-20

Alternate Designations
 1992 PY = 1985 TN2 = 1990 BM2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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