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545 Messalina (A904 TC)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000545
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699396877271284 3.2124e-08  
a 3.202372009610684 1.2832e-08 au
q 2.658161910311348 1.0304e-07 au
i 11.20559240521415 4.0933e-06 deg
node 333.5988423604063 1.5603e-05 deg
peri 331.0135658945534 1.9276e-05 deg
M 220.2017630926307 1.263e-05 deg
tp 2460013.340420960753
(2023-Mar-09.84042096)
7.414e-05 TDB
period 2093.177696795729
5.73
1.2581e-05
3.444e-08
d
yr
n .1719873093197458 1.0338e-09 deg/d
Q 3.746582108910021 1.5013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3239  
   data-arc span      42478 days (116.30 yr)  
   first obs. used      1904-10-03  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40683  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:47:33  

Additional Information
 Earth MOID = 1.64799 au 
 Jupiter MOID = 1.59075 au 
 T_jup = 3.142 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455833.5 (2011-Sep-29.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1684808376827559 3.0936e-08  
q 2.660893145660001 9.781e-08 au
tp 2455797.076005249285
(2011-Aug-23.57600525)
7.3353e-05 TDB
node 334.2348297518722 1.5803e-05 deg
peri 326.4698296233557 1.938e-05 deg
i 11.12455767295387 4.0676e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3239  
   data-arc span      42478 days (116.30 yr)  
   first obs. used      1904-10-03  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40683  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:47:33  

Additional Information
 Jupiter MOID = 1.59075 au 
 T_jup = 3.142 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.570342046144891E-16 -3.01049375568469E-15 3.904007380084375E-13 5.544620040216361E-15 7.116546457203438E-14 1.615869056219082E-15
q -3.01049375568469E-15 9.566882510992752E-15 -1.16889219043123E-12 -1.675782986076398E-14 -2.177807994370566E-13 -3.743012935048137E-15
tp 3.904007380084375E-13 -1.16889219043123E-12 5.380611241513366E-9 1.86427746419359E-11 8.294259503308121E-10 5.015349839782338E-12
node 5.544620040216361E-15 -1.675782986076398E-14 1.86427746419359E-11 2.497428711092888E-10 -2.427275531001963E-10 6.833765247566366E-12
peri 7.116546457203438E-14 -2.177807994370566E-13 8.294259503308121E-10 -2.427275531001963E-10 3.755686207838108E-10 -6.317380637497473E-12
i 1.615869056219082E-15 -3.743012935048137E-15 5.015349839782338E-12 6.833765247566366E-12 -6.317380637497473E-12 1.654535162037017E-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 8.81   n/a E2021B10 IRAS observations used: 11
diameter diameter 112.631 km 1.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.2 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Di Martino, M. (1984) Icarus 60, 541-546.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.041   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.686   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=13.94, mean=14.07, max.=14.21) deg.
U-B UB 0.343   0.058 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.94 deg.
Tholen spectral type spec_T CD   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Cb   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)

545 Messalina (A904 TC)          Discovered 1904-Oct-03 by Gotz, P. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A904 TC = 1949 YH = 1973 YO4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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