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JPL Small-Body Database Browser
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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1676533306283108 3.6294e-08  
a 3.182018755973936 1.4106e-08 au
q 2.648542713413152 1.1617e-07 au
i 2.510111597243968 3.7655e-06 deg
node 116.0350532704752 9.2425e-05 deg
peri 231.8142538835455 9.3047e-05 deg
M 148.2012605424865 1.1544e-05 deg
tp 2458147.003142316048
(2018-Jan-28.50314232)
6.502e-05 TDB
period 2073.254084624587
5.68
1.3787e-05
3.775e-08
d
yr
n .1736400775330857 1.1547e-09 deg/d
Q 3.715494798534721 1.6471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2997  
   data-arc span      23511 days (64.37 yr)  
   first obs. used      1955-09-23  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46093  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:22:19  

Additional Information
 Earth MOID = 1.64282 au 
 Jupiter MOID = 1.70715 au 
 T_jup = 3.176 
[ show covariance matrix ]

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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