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130 Elektra (A873 DA)
Classification: Main-belt Asteroid          SPK-ID: 2000130
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .209103031129885 2.0399e-08  
a 3.126154082894164 6.6138e-09 au
q 2.472465788381928 6.2283e-08 au
i 22.78100017441989 4.9586e-07 deg
node 145.0100336734866 1.0749e-06 deg
peri 237.5587519195194 3.1523e-06 deg
M 52.85337353080705 3.0959e-06 deg
tp 2458904.095898703849
(2020-Feb-24.59589870)		 1.6889e-05 TDB
period 2018.896228155015
5.53		 6.4069e-06
1.754e-08		 d
yr
n .1783152571090733 5.6587e-10 deg/d
Q 3.779842377406399 7.9967e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3267  
   data-arc span      46488 days (127.28 yr)  
   first obs. used      1893-12-02  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40679  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:20:36  

Additional Information
 Earth MOID = 1.54071 au 
 Jupiter MOID = 1.90957 au 
 T_jup = 3.062 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457326.5 (2015-Oct-31.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2083318376352635 2.094e-08  
q 2.473528632118478 6.4414e-08 au
tp 2456875.428412155220
(2014-Aug-05.92841216)		 1.4494e-05 TDB
node 145.4091391799963 1.0728e-06 deg
peri 235.8144722123575 3.131e-06 deg
i 22.86725694586903 4.9735e-07 deg
   Orbit Determination Parameters
   # obs. used (total)      3267  
   data-arc span      46488 days (127.28 yr)  
   first obs. used      1893-12-02  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40679  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:20:36  

Additional Information
 Jupiter MOID = 1.90957 au 
 T_jup = 3.062 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.384693898138442E-16 -1.344735155282366E-15 -5.116675125312482E-14 1.350441763910956E-15 -4.647447589499643E-14 6.080707155238513E-16
q -1.344735155282366E-15 4.149194381429171E-15 1.751176944015328E-13 -4.355485157910007E-15 1.465297179846839E-13 -2.084475949426215E-15
tp -5.116675125312482E-14 1.751176944015328E-13 2.100877181818696E-10 8.252618372381559E-12 3.617419143341805E-11 -3.127473064933082E-12
node 1.350441763910956E-15 -4.355485157910007E-15 8.252618372381559E-12 1.150968010300779E-12 8.639561625627401E-13 -7.907802056517484E-14
peri -4.647447589499643E-14 1.465297179846839E-13 3.617419143341805E-11 8.639561625627401E-13 9.803468865572178E-12 -5.235536748581708E-13
i 6.080707155238513E-16 -2.084475949426215E-15 -3.127473064933082E-12 -7.907802056517484E-14 -5.235536748581708E-13 2.473569798833724E-13

[ 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 7.21   n/a E2020-QM5 IRAS observations used: 20
diameter diameter 180.652 km 2.698 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.225 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Debehogne, H.; Lagerkvist, C.-I.; Hahn, G. (1990) in Asteroids, Comets, Meteors III. C.-I. Lagerkvist, H. Rickman, B.A. Lindblad, M. Lindgren, eds. Uppsala, p. 45-48.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[Danforth, C.W.; Ratcliff, S.J. (1994) Minor Planet Bull. 21, 1-3.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Shevchenko, V.G.; Chiorny, V.G.; Kalashnikov, A.V.; Krugly, Yu.N.; et al. (1996) Astron. Astrophys. Suppl. Ser. 115, 475-479.]
[Harris, A.W.; Young, J.W.; Bowell, E.; Tholen, D.J. (1999) Icarus 142, 173-201.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Foerster, I.; Potthoff, H. (2001) Minor Planet Bull. 28, 25-26.]
[Durech, J.; Kaasalainen, M.; Marciniak, A.; et al. (2007) Astron. Astrophys. 465, 331-337.]
[Torppa, J.; Hentunen, V.-P.; Paakkonen, P.; Kehusmaa, P.; Muinonen, K. (2008) Icarus 198, 91-107.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Ferrero, A. (2013) Minor Planet Bull. 40, 31-32.]
[Garceran, A.C. (2013) Posting on CALL web site. http://www.MinorPlanet.info/call.html]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Hanus, J.; Marchis, M.; Viikinkoski, M.; Yang, B.; Kaasalainen, M. (2017) Astron. Astrophys. 599, A36.]
geometric albedo albedo 0.086   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.753   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=16; phase (min.=6.41, mean=16.24, max.=22.14) deg.
U-B UB 0.483   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=8.28, mean=16.87, max.=22.14) deg.
Tholen spectral type spec_T G   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

130 Elektra (A873 DA)          Discovered 1873-Feb-17 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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