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JPL Small-Body Database Browser
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661 Cloelia (A908 DD)
Classification: Main-belt Asteroid          SPK-ID: 2000661
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03451915689594037 4.3965e-08  
a 3.018485023891408 1.2825e-08 au
q 2.914289465763655 1.3319e-07 au
i 9.227519567853287 4.7838e-06 deg
node 335.7655833860863 2.6547e-05 deg
peri 183.2774036609712 6.9747e-05 deg
M 74.67704416808684 6.3529e-05 deg
tp 2458203.156069145146
(2018-Mar-25.65606915)
0.00033851 TDB
period 1915.49915641783
5.24
1.2208e-05
3.342e-08
d
yr
n .1879405682815518 1.1978e-09 deg/d
Q 3.122680582019163 1.3268e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2572  
   data-arc span      37088 days (101.54 yr)  
   first obs. used      1918-02-03  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43657  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:10:53  

Additional Information
 Earth MOID = 1.9236 au 
 Jupiter MOID = 1.86862 au 
 T_jup = 3.227 
[ 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 9.6   n/a MPO435701  
diameter diameter 40.081 km 0.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.536 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.182   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.793   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=4.20, mean=7.94, max.=11.78) deg.
U-B UB 0.395   0.066 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=4.20, mean=7.94, max.=11.78) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B K   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

661 Cloelia (A908 DD)          Discovered 1908-Feb-22 by Metcalf, J. H. at Taunton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A908 DD = 1929 CF = 1930 KC = 1936 RJ = 1950 HM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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