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JPL Small-Body Database Browser
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495 Eulalia (A902 UL)
Classification: Main-belt Asteroid          SPK-ID: 2000495
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 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1284766770597853 3.5151e-08  
a 2.487113233599585 7.2973e-09 au
q 2.167577189875293 8.9134e-08 au
i 2.278486802996081 3.635e-06 deg
node 186.4095701292422 9.6161e-05 deg
peri 207.7812656985052 9.7187e-05 deg
M 356.3623281962144 1.543e-05 deg
tp 2459014.976473423969
6.1427e-05 TDB
period 1432.655476836946
n .2512816275932699 1.1059e-09 deg/d
Q 2.806649277323878 8.2348e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2793  
   data-arc span      42806 days (117.20 yr)  
   first obs. used      1902-10-26  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44971  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:28:51  

Additional Information
 Earth MOID = 1.17416 au 
 Jupiter MOID = 2.60416 au 
 T_jup = 3.462 
[ 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 11.0   n/a MPO492755 IRAS observations used: 22
diameter diameter 37.287 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 28.967 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Behrend, R. (2005) Observatoire de Geneve web site,]
[Warner, B.D. (2013) Minor Planet Bull. 40, 71-80.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
[Vokrouhlicky, D.; Durech, J.; Pravec, P.; Oey, J.; et al. (2016) Astron. Astrophys. 585, A56.]
[Oey, J.; Williams, H.; Groom, R. (2017) Minor Planet Bull. 44, 200-204.]
geometric albedo albedo 0.062   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.690   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.28 deg.
U-B UB 0.160   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.28 deg.

495 Eulalia (A902 UL)          Discovered 1902-Oct-25 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A902 UL = 1988 PA2 = A906 XC = A916 GF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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