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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159013484707095 2.0706e-08  
a 3.095174459894916 1.3172e-08 au
q 2.602999983250625 6.9553e-08 au
i 2.509054236255008 9.3514e-07 deg
node 31.32743796675923 5.3929e-06 deg
peri 61.56499169856836 6.8894e-06 deg
M 280.9902670234134 5.3718e-06 deg
tp 2459637.020073655817
(2022-Feb-26.52007366)
3.1018e-05 TDB
period 1988.960354576347
5.45
1.2697e-05
3.476e-08
d
yr
n .1809990828483259 1.1554e-09 deg/d
Q 3.587348936539207 1.5267e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2662  
   data-arc span      24735 days (67.72 yr)  
   first obs. used      1953-05-18  
   last obs. used      2021-02-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45141  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:36:12  

Additional Information
 Earth MOID = 1.6206 au 
 Jupiter MOID = 1.61059 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457082.5 (2015-Mar-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1547867544045721 1.9961e-08  
q 2.621519470315112 6.6574e-08 au
tp 2457627.791520570456
(2016-Aug-27.29152057)
2.7925e-05 TDB
node 31.81195744230851 5.3423e-06 deg
peri 58.70573794710342 7.0824e-06 deg
i 2.527972003177552 9.3911e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2662  
   data-arc span      24735 days (67.72 yr)  
   first obs. used      1953-05-18  
   last obs. used      2021-02-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45141  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:36:12  

Additional Information
 Jupiter MOID = 1.61059 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.984368994488195E-16 -1.31353257681024E-15 -1.930365058959408E-13 3.054770357770716E-15 3.83376092700681E-15 1.508237734086475E-15
q -1.31353257681024E-15 4.432078712813692E-15 6.197315356386959E-13 -9.541486371658732E-15 -2.093597924762191E-14 -4.933402688310353E-15
tp -1.930365058959408E-13 6.197315356386959E-13 7.798026299690518E-10 1.395182361465735E-11 1.163365643376087E-10 -3.046320070161832E-12
node 3.054770357770716E-15 -9.541486371658732E-15 1.395182361465735E-11 2.853973241822259E-11 -2.597644496892607E-11 -2.911713855254158E-12
peri 3.83376092700681E-15 -2.093597924762191E-14 1.163365643376087E-10 -2.597644496892607E-11 5.016091164865542E-11 2.421405532720737E-12
i 1.508237734086475E-15 -4.933402688310353E-15 -3.046320070161832E-12 -2.911713855254158E-12 2.421405532720737E-12 8.819353142056145E-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 12.73   n/a MPCxxxxx  
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. 2020-October); 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

[ show close-approach data ]
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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