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JPL Small-Body Database Browser
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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 ]

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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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1696453723696635 3.2963e-08  
a 3.202996242858148 1.4935e-08 au
q 2.659622752539844 1.0619e-07 au
i 11.20185569557348 4.3649e-06 deg
node 333.6160166365735 1.7348e-05 deg
peri 330.8662655074514 2.1537e-05 deg
M 117.2140873401545 1.3153e-05 deg
tp 2457918.773179541426
(2017-Jun-14.27317954)
7.7022e-05 TDB
period 2093.789756284793
5.73
1.4644e-05
4.009e-08
d
yr
n .1719370337539437 1.2025e-09 deg/d
Q 3.746369733176451 1.7468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2647  
   data-arc span      42031 days (115.07 yr)  
   first obs. used      1904-10-03  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44566  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:54:25  

Additional Information
 Earth MOID = 1.65067 au 
 Jupiter MOID = 1.58823 au 
 T_jup = 3.141 
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Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1689067676457665 3.167e-08  
q 2.66166618643046 1.0014e-07 au
tp 2455796.176413244872
(2011-Aug-22.67641325)
7.9573e-05 TDB
node 334.2469611188976 1.7546e-05 deg
peri 326.2513746793842 2.1583e-05 deg
i 11.12490043868301 4.3378e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2647  
   data-arc span      42031 days (115.07 yr)  
   first obs. used      1904-10-03  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44566  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:54:25  

Additional Information
 Jupiter MOID = 1.58823 au 
 T_jup = 3.141 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.002983384752189E-15 -3.152797203368165E-15 4.270082898953107E-13 5.44842334511455E-15 7.720243935746554E-14 1.612728322417566E-15
q -3.152797203368165E-15 1.002871509055733E-14 -1.411662349067633E-12 -1.640453708189318E-14 -2.626640770140795E-13 -3.763328414418213E-15
tp 4.270082898953107E-13 -1.411662349067633E-12 6.331905064363122E-9 2.85114506413446E-11 1.007067497573239E-9 7.147197337832585E-12
node 5.44842334511455E-15 -1.640453708189318E-14 2.85114506413446E-11 3.078662980468896E-10 -2.983776116341013E-10 1.605771908235019E-11
peri 7.720243935746554E-14 -2.626640770140795E-13 1.007067497573239E-9 -2.983776116341013E-10 4.658044860422478E-10 -1.507208236774592E-11
i 1.612728322417566E-15 -3.763328414418213E-15 7.147197337832585E-12 1.605771908235019E-11 -1.507208236774592E-11 1.881651519857322E-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 8.84   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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. 2019-January); 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

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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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