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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1698581179756868 3.2535e-08  
a 3.202759860755463 1.3688e-08 au
q 2.658745098479467 1.0387e-07 au
i 11.20435173930231 4.105e-06 deg
node 333.6004747685728 1.6378e-05 deg
peri 330.9537803896464 2.0055e-05 deg
M 185.8836596434082 1.265e-05 deg
tp 2460013.062925812599
(2023-Mar-09.56292581)		 7.4304e-05 TDB
period 2093.557977074351
5.73		 1.3421e-05
3.674e-08		 d
yr
n .1719560690184865 1.1024e-09 deg/d
Q 3.746774623031459 1.6013e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2981  
   data-arc span      42211 days (115.57 yr)  
   first obs. used      1904-10-03  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42112  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:07:47  

Additional Information
 Earth MOID = 1.65056 au 
 Jupiter MOID = 1.5906 au 
 T_jup = 3.141 
[ 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 8.8   n/a MPO502158 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-August); 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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1905-Feb-03 23:03 00:02 Jupiter 1.98196801600919 1.98196733018537 1.9819687018339 3.5309683392458 3.40778647650335 2416880.460741417 1.56177384564397 89.8229349444473 15.5571153839402 -80.4998240925144 2400673.75171001 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
1992-Jun-22 20:14 < 00:01 Jupiter 1.9856502554444 1.98564974334862 1.98565076754019 3.61698696802543 3.49706319843972 2448796.342889597 0.384822209373877 115.195378561285 23.8327849745998 -89.1742056661571 3641112.63227834 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2003-Jun-17 17:44 < 00:01 Jupiter 1.68505274659455 1.6850523375608 1.68505315564143 3.21140772982756 3.05086923786945 2452808.238551641 0.224437502133553 472.984511245497 12.2391671632355 -88.2712729079592 3275568.9450584 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2014-Jul-02 21:51 < 00:01 Jupiter 1.57248750812227 1.57248712073126 1.57248789551498 2.77101630905863 2.56928563792836 2456841.410263585 0.227601925776563 209.537486256144 9.3168061995185 -85.6622355779637 2950706.99213774 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2025-Jun-13 01:42 < 00:01 Jupiter 1.69148713776349 1.69148659381349 1.69148768171349 2.02510037614657 1.76054517621779 2460839.570810398 0.475457719754352 81.6856607688638 39.2327200979359 -73.035397614905 2335485.16827384 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2036-Mar-03 15:04 < 00:01 Jupiter 1.93266134953997 1.93266074817187 1.93266195090796 2.45652913586897 2.27112318964167 2464756.127733997 0.727135213637444 39.5639321554223 10.7793183667879 -67.0581973912542 1899739.41869837 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2134-May-26 06:42 00:02 Jupiter 1.7884521462595 1.7884509980482 1.78845329453697 3.3164678950748 3.17044891932575 2500632.779462889 1.62258270403217 728.993750196446 31.0631697537081 -86.5380361337481 2431908.73409564 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2145-Jun-08 11:15 00:02 Jupiter 1.58370660440004 1.58370607766062 1.58370713113999 3.05565127783931 2.87529715490302 2504663.969042043 1.68811797578116 431.541570093225 21.2661732074973 -89.4686420901394 2962902.76106755 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2156-Jun-20 07:24 00:02 Jupiter 1.61220356843227 1.61220278185594 1.61220435502364 2.62461078290102 2.41615770053835 2508693.808169925 2.11064096270566 296.282418486527 11.8689024101574 -79.7409917882057 2837439.14281591 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08
2167-Apr-20 15:24 00:03 Jupiter 1.84564611175609 1.84564466797162 1.84564755554035 2.05923623773465 1.82279832259912 2512650.141435411 2.95812485164052 73.791855624309 48.1425355702569 50.0912991280294 2480929.81413647 T 49 CATAB v2.0f-lin.ifort 2020-May-20 01:08:03 2020-May-20 01:08

Alternate Designations
 A904 TC = 1949 YH = 1973 YO4 
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