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2089 Cetacea (1977 VF)
Classification: Main-belt Asteroid          SPK-ID: 2002089
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 .1563456957979989 3.8152e-08  
a 2.533494186005502 1.026e-08 au
q 2.137393274694287 9.7007e-08 au
i 15.37839570958907 3.5548e-06 deg
node 102.6905650129112 1.6169e-05 deg
peri 286.9654697526609 2.0907e-05 deg
M 201.1957557386164 1.627e-05 deg
tp 2459650.237449704887
(2022-Mar-11.73744970)
6.8271e-05 TDB
period 1472.917068316909
4.03
8.9477e-06
2.45e-08
d
yr
n .2444129460807792 1.4848e-09 deg/d
Q 2.929595097316717 1.1864e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2724  
   data-arc span      25826 days (70.71 yr)  
   first obs. used      1949-11-18  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36563  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:45:21  

Additional Information
 Earth MOID = 1.20111 au 
 Jupiter MOID = 2.56869 au 
 T_jup = 3.383 
[ 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 11.4   n/a MPO473792  
diameter diameter 16.123 km 0.502 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 39.120 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:
[Bembrick, C.S.; Allen, B.; Richards, T. (2006) Minor Planet Bull. 33, 42-43.]
geometric albedo albedo 0.276   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.823   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=22.02, mean=22.13, max.=22.23) deg.
U-B UB 0.404   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=22.23 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Sq   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)

2089 Cetacea (1977 VF)          Discovered 1977-Nov-09 by Thomas, N. G. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1977 VF = 1936 MB = 1939 FN = 1949 WE = 1972 LG = 1976 KO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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