Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
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

[ show close-approach data ]
Alternate Designations
 A878 CB = A906 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-27 06:41 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin