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2217 Eltigen (1971 SK2)
Classification: Main-belt Asteroid          SPK-ID: 2002217
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1686006321535404 3.1627e-08  
a 3.152351714712225 1.5733e-08 au
q 2.620863222841447 1.0476e-07 au
i 2.248856165328083 3.4842e-06 deg
node 127.4924487912966 9.6238e-05 deg
peri 173.5901504768107 9.6939e-05 deg
M 277.8210007277788 1.3455e-05 deg
tp 2459467.168808835228
(2021-Sep-09.66880884)
7.7995e-05 TDB
period 2044.327293694254
5.60
1.5304e-05
4.19e-08
d
yr
n .1760970472342777 1.3183e-09 deg/d
Q 3.683840206583004 1.8385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2890  
   data-arc span      23649 days (64.75 yr)  
   first obs. used      1955-11-19  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42928  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:11:34  

Additional Information
 Earth MOID = 1.60536 au 
 Jupiter MOID = 1.54883 au 
 T_jup = 3.184 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456797.5 (2014-May-20.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1668377727625544 3.162e-08  
q 2.627591622617526 1.0458e-07 au
tp 2457421.219212195884
(2016-Feb-02.71921220)
7.283e-05 TDB
node 127.4993439154682 9.6258e-05 deg
peri 173.5986260710664 9.6975e-05 deg
i 2.248163535058068 3.4826e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2890  
   data-arc span      23649 days (64.75 yr)  
   first obs. used      1955-11-19  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42928  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:11:34  

Additional Information
 Jupiter MOID = 1.54883 au 
 T_jup = 3.184 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.998081456161861E-16 -3.28381704328552E-15 -5.962996799238124E-14 -3.871438572161043E-15 2.406955561189585E-14 -2.372218961504387E-16
q -3.28381704328552E-15 1.093798601753411E-14 4.678528322646418E-13 1.923395945285734E-14 -5.026786419330745E-14 1.108228530887059E-15
tp -5.962996799238124E-14 4.678528322646418E-13 5.304146238494116E-9 3.92669919263545E-12 8.766320319108277E-10 7.742339173476471E-13
node -3.871438572161043E-15 1.923395945285734E-14 3.92669919263545E-12 9.265694924469747E-9 -9.257651106182292E-9 5.782656575506937E-11
peri 2.406955561189585E-14 -5.026786419330745E-14 8.766320319108277E-10 -9.257651106182292E-9 9.404245047631645E-9 -5.766340696372646E-11
i -2.372218961504387E-16 1.108228530887059E-15 7.742339173476471E-13 5.782656575506937E-11 -5.766340696372646E-11 1.212865433966281E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.4   n/a MPO344315  
diameter diameter 28.800 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.924 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Ditteon, R.; Kirkpatrick, E.; Doering, K. (2010) Minor Planet Bull. 37, 1-4.]
[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.]
geometric albedo albedo 0.097   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2217 Eltigen           Discovered 1971 Sept. 26 by T. M. Smirnova at the Crimean Astrophysical Observatory.
Named for the site of the heroic landing of Soviet troops in the Crimea in November 1943.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5850Last Updated: 2006-03-21

[ show close-approach data ]
Alternate Designations
 1971 SK2 = 1942 LG = 1958 FJ = 1959 NP = 1970 LD = 1974 CL = 1976 NN = 1976 OB1 = 1977 TH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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