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7896 Svejk (1995 EC)
Classification: Main-belt Asteroid          SPK-ID: 2007896
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1386856659536399 1.6085e-08  
a 3.136534641030706 1.4345e-08 au
q 2.701542245552702 5.3121e-08 au
i 1.906984522764517 4.9382e-07 deg
node 52.32509234413502 2.4844e-05 deg
peri 139.8245468078792 2.6073e-05 deg
M 235.1440684480619 1.0837e-05 deg
tp 2460100.188150574078
(2023-Jun-04.68815057)
6.3224e-05 TDB
period 2028.960347000316
5.55
1.3919e-05
3.811e-08
d
yr
n .1774307716423519 1.2172e-09 deg/d
Q 3.571527036508711 1.6334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2805  
   data-arc span      16150 days (44.22 yr)  
   first obs. used      1976-12-18  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46761  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:37:20  

Additional Information
 Earth MOID = 1.70239 au 
 Jupiter MOID = 1.38119 au 
 T_jup = 3.196 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457233.5 (2015-Jul-30.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374586301870133 1.6226e-08  
q 2.70690722176 5.3674e-08 au
tp 2458076.570908966352
(2017-Nov-19.07090897)
5.814e-05 TDB
node 52.35033443172573 2.4806e-05 deg
peri 140.8152302654191 2.6015e-05 deg
i 1.909291729404445 4.9522e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2805  
   data-arc span      16150 days (44.22 yr)  
   first obs. used      1976-12-18  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46761  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:37:20  

Additional Information
 Jupiter MOID = 1.38119 au 
 T_jup = 3.196 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.632866668830702E-16 -8.470517345837706E-16 -1.475933326812761E-13 -6.525023989306004E-14 5.116454908425497E-14 1.232926204495768E-15
q -8.470517345837706E-16 2.880887536621461E-15 6.607722761594968E-13 1.966098917022404E-13 -1.35886725230877E-13 -3.728582233271651E-15
tp -1.475933326812761E-13 6.607722761594968E-13 3.380309217330909E-9 2.131644077820543E-11 4.485708600579253E-10 -8.224271510990519E-13
node -6.525023989306004E-14 1.966098917022404E-13 2.131644077820543E-11 6.153404417338025E-10 -6.125818649362106E-10 -1.090513880489322E-11
peri 5.116454908425497E-14 -1.35886725230877E-13 4.485708600579253E-10 -6.125818649362106E-10 6.767700552983303E-10 1.079354684443757E-11
i 1.232926204495768E-15 -3.728582233271651E-15 -8.224271510990519E-13 -1.090513880489322E-11 1.079354684443757E-11 2.452410461725904E-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 12.64   n/a MPCxxxxx  
diameter diameter 15.305 km 0.272 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.20582 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.083   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7896 Švejk           Discovered 1995 Mar. 1 by Z. Moravec at Klet.
Named for a literary character created by Jaroslav Hašek, Czech writer and humorist (1883-1923). His "good soldier" Josef Švejk is devoted to the disintegrating Austrian-Hungarian monarchy regime, but by his simplicity (or perhaps his ingenuity) he helps to reveal its flaws.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1995 EC = 1976 YJ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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