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6353 Semper (3107 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2006353
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1586836008755902 2.8199e-08  
a 3.09713363885431 1.362e-08 au
q 2.605669320647988 9.183e-08 au
i 2.508386596929303 3.4339e-06 deg
node 31.35002895250262 8.2344e-05 deg
peri 61.325218611301 8.3183e-05 deg
M 245.0098460176511 1.266e-05 deg
tp 2459636.411237190384
(2022-Feb-25.91123719)
7.0935e-05 TDB
period 1990.849107165113
5.45
1.3133e-05
3.596e-08
d
yr
n .1808273659235909 1.1929e-09 deg/d
Q 3.588597957060632 1.5782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2482  
   data-arc span      24631 days (67.44 yr)  
   first obs. used      1953-05-18  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .453  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:36:25  

Additional Information
 Earth MOID = 1.62351 au 
 Jupiter MOID = 1.61019 au 
 T_jup = 3.202 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456949.5 (2014-Oct-19.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1548226895358184 2.7e-08  
q 2.621568897047349 8.7144e-08 au
tp 2457627.631384262290
(2016-Aug-27.13138426)
7.2745e-05 TDB
node 31.81625900484526 8.1303e-05 deg
peri 58.67117515294238 8.2337e-05 deg
i 2.527883059212393 3.449e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2482  
   data-arc span      24631 days (67.44 yr)  
   first obs. used      1953-05-18  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .453  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:36:25  

Additional Information
 Jupiter MOID = 1.61019 au 
 T_jup = 3.202 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.289833332531192E-16 -2.334906297313422E-15 3.210670439273357E-13 -3.778721113046162E-15 8.935950937727166E-14 2.149491259876845E-16
q -2.334906297313422E-15 7.594001954470211E-15 -8.661507885023827E-13 1.265981879079361E-14 -2.674969251697406E-13 -5.965315157675738E-16
tp 3.210670439273357E-13 -8.661507885023827E-13 5.291875160871126E-9 6.376698610522429E-12 9.637989996192248E-10 -1.666099892178818E-13
node -3.778721113046162E-15 1.265981879079361E-14 6.376698610522429E-12 6.61023751757723E-9 -6.60217566978365E-9 -1.004169457528621E-10
peri 8.935950937727166E-14 -2.674969251697406E-13 9.637989996192248E-10 -6.60217566978365E-9 6.779321483201037E-9 1.002788095239653E-10
i 2.149491259876845E-16 -5.965315157675738E-16 -1.666099892178818E-13 -1.004169457528621E-10 1.002788095239653E-10 1.189550334926037E-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 12.6   n/a MPO435759  
diameter diameter 15.497 km 0.633 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 24. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.074   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

6353 Semper (3107 T-3)          Discovered 1977-Oct-16 by van Houten & Gehrels at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 3107 T-3 = 1972 VZ = 1985 FN2 = 1988 VU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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