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2461 Clavel (1981 EC1)
Classification: Main-belt Asteroid          SPK-ID: 2002461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1676533313637981 3.5849e-08  
a 3.18201875571117 1.3901e-08 au
q 2.648542710854104 1.1444e-07 au
i 2.510111468562961 3.7538e-06 deg
node 116.0350660298678 8.8126e-05 deg
peri 231.8142414631508 8.8744e-05 deg
M 148.2012603532429 1.1436e-05 deg
tp 2458147.003143511630
(2018-Jan-28.50314351)
6.4242e-05 TDB
period 2073.254084367778
5.68
1.3586e-05
3.72e-08
d
yr
n .1736400775545942 1.1378e-09 deg/d
Q 3.715494800568236 1.6231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3156  
   data-arc span      23594 days (64.60 yr)  
   first obs. used      1955-09-23  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45219  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:40:09  

Additional Information
 Earth MOID = 1.64282 au 
 Jupiter MOID = 1.70715 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456670.5 (2014-Jan-13.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1610780465301161 3.536e-08  
q 2.679861004771355 1.1182e-07 au
tp 2456066.102177574082
(2012-May-18.60217757)
6.6721e-05 TDB
node 116.0607935300513 8.7898e-05 deg
peri 231.6489625577519 8.8595e-05 deg
i 2.507897434266782 3.7529e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3156  
   data-arc span      23594 days (64.60 yr)  
   first obs. used      1955-09-23  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45219  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:40:09  

Additional Information
 Jupiter MOID = 1.70715 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.250335191053413E-15 -3.931532664060059E-15 2.209974318302495E-13 -3.137718233574312E-16 1.508058030667829E-14 -6.032793708082791E-17
q -3.931532664060059E-15 1.250452679291413E-14 -7.285225732526494E-13 -4.408296450592943E-15 -4.284293919141154E-14 1.965130881932661E-16
tp 2.209974318302495E-13 -7.285225732526494E-13 4.451683281845537E-9 -6.776178845093539E-12 7.591232203004476E-10 -3.625232645596321E-13
node -3.137718233574312E-16 -4.408296450592943E-15 -6.776178845093539E-12 7.726060548795451E-9 -7.720184640703549E-9 3.001472323310317E-11
peri 1.508058030667829E-14 -4.284293919141154E-14 7.591232203004476E-10 -7.720184640703549E-9 7.849026353232947E-9 -3.0044162658864E-11
i -6.032793708082791E-17 1.965130881932661E-16 -3.625232645596321E-13 3.001472323310317E-11 -3.0044162658864E-11 1.408463115468291E-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 11.7   n/a MPO384772  
diameter diameter 25.943 km 0.282 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.238 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.060   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2461 Clavel (1981 EC1)          Discovered 1981-Mar-05 by Debehogne, H. at La Silla
and G. de Sanctis.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 EC1 = 1955 SN2 = 1955 UJ = 1955 VG = 1972 TH9 = 1976 JM1 = 1978 UM2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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