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181 Eucharis (A878 CB)
Classification: Main-belt Asteroid          SPK-ID: 2000181
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2067906988809197 3.3155e-08  
a 3.124488671326152 1.0551e-08 au
q 2.478373475337101 1.0445e-07 au
i 18.89346241553499 4.2739e-06 deg
node 143.0198644412431 1.1096e-05 deg
peri 318.9291726397375 1.4556e-05 deg
M 281.9223427798572 1.0365e-05 deg
tp 2459438.013170488028
(2021-Aug-11.51317049)
5.9061e-05 TDB
period 2017.283138140273
5.52
1.0218e-05
2.798e-08
d
yr
n .1784578442131246 9.0394e-10 deg/d
Q 3.770603867315203 1.2733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2909  
   data-arc span      46807 days (128.15 yr)  
   first obs. used      1892-08-27  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40125  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:30  

Additional Information
 Earth MOID = 1.52406 au 
 Jupiter MOID = 1.46386 au 
 T_jup = 3.100 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455418.5 (2010-Aug-10.0) TDB
Reference: JPL 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2023223784657781 3.3216e-08  
q 2.496066744382269 1.0426e-07 au
tp 2455393.815009473840
(2010-Jul-16.31500947)
5.4871e-05 TDB
node 143.2654180255439 1.108e-05 deg
peri 318.5234631841321 1.4712e-05 deg
i 18.88774392035709 4.2744e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2909  
   data-arc span      46807 days (128.15 yr)  
   first obs. used      1892-08-27  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40125  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:30  

Additional Information
 Jupiter MOID = 1.46386 au 
 T_jup = 3.100 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.103332010894952E-15 -3.451454544948509E-15 1.853428707097948E-13 -4.491660271130003E-15 5.160499728277575E-14 -2.916742268614467E-15
q -3.451454544948509E-15 1.086957149210366E-14 -5.347684750347808E-13 1.765875980384405E-14 -1.581655017997503E-13 1.074156577900403E-14
tp 1.853428707097948E-13 -5.347684750347808E-13 3.010874591679605E-9 -7.788638694106756E-12 5.508721593175249E-10 -7.797071053781909E-12
node -4.491660271130003E-15 1.765875980384405E-14 -7.788638694106756E-12 1.227632842170214E-10 -1.163308985688342E-10 5.080437624371589E-12
peri 5.160499728277575E-14 -1.581655017997503E-13 5.508721593175249E-10 -1.163308985688342E-10 2.164520052882482E-10 -5.822613211324808E-12
i -2.916742268614467E-15 1.074156577900403E-14 -7.797071053781909E-12 5.080437624371589E-12 -5.822613211324808E-12 1.827021344093161E-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 7.9   n/a MPO502154 IRAS observations used: 12
diameter diameter 115.383 km 1.464 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 52.23 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2008) Minor Planet Bull. 35, 21-22.]
geometric albedo albedo 0.101   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.815   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.97, mean=15.58, max.=19.39) deg.
U-B UB 0.379   0.043 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.97, mean=15.58, max.=19.39) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices
SMASSII spectral type spec_B Xk   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)

181 Eucharis (A878 CB)          Discovered 1878-Feb-02 by Cottenot at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
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
1903-Oct-14 15:25 00:02 Jupiter 1.89987918256603 1.89987727568047 1.89988108945828 4.78488010486663 4.69078013456014 2416402.142191748 1.81184103260401 207.169234918583 20.128018033542 63.4458473226268 4375382.20300663 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32
1914-Mar-31 17:06 00:01 Jupiter 1.51778222031919 1.51778169490072 1.51778274574198 4.37280520188956 4.24326448785328 2420223.212760171 1.35328217959779 226.875592914512 20.84757663962 -85.9743884681344 3271030.82443077 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32
1986-Sep-22 21:52 < 00:01 Jupiter 1.84559849443931 1.84559776912084 1.8455992197583 4.70532611830108 4.606756998194 2446696.411009215 0.506406875042578 71.1644939298941 20.0992338785797 64.379768260612 4090899.08289577 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32
1997-Mar-15 11:34 < 00:01 Jupiter 1.52646387948059 1.52646347131057 1.5264642876506 4.36683991949465 4.23786585279266 2450522.981742133 0.304895592955547 77.4403153458898 18.9811820961403 87.7221208721776 3283777.4544785 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32
2069-Aug-25 08:27 < 00:01 Jupiter 1.77837894223038 1.77837807528361 1.77837980917968 4.6396701491493 4.53585282848895 2476983.852113169 0.864869301979667 127.831937985507 19.2698941368898 72.3468321209764 3871887.51926721 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32
2080-Feb-23 02:18 < 00:01 Jupiter 1.53380471397723 1.53380402120838 1.53380540674791 4.36117682233114 4.23265765657908 2480817.596041237 0.948751273726768 132.164179062929 25.3787038364591 -79.5320251435561 3257645.17950885 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32
2152-Jul-24 17:04 00:02 Jupiter 1.71506054861025 1.71505865085953 1.71506244638292 4.5991618246688 4.49049473918461 2507267.211437443 2.07726461236075 330.005121257629 18.6060630572181 73.6587990751324 3701767.89608564 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32
2163-Jan-26 23:15 00:02 Jupiter 1.56680715971192 1.56680565279216 1.56680866664549 4.342247496878 4.21591092691728 2511105.468923393 2.06938972460787 263.635986188038 27.8084093271889 -74.1300437319059 3253982.95899945 T 72 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:40 2020-Nov-13 04:32

Alternate Designations
 A878 CB = A906 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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