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52 Europa (A858 CA)
Classification: Main-belt Asteroid          SPK-ID: 2000052
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.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 111 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1106853018486346 1.232e-08  
a 3.09535328180759 3.8841e-09 au
q 2.752743169482555 3.8486e-08 au
i 7.478595994940586 3.6781e-07 deg
node 128.5989593663517 2.9331e-06 deg
peri 343.2103422272036 1.2328e-05 deg
M 21.6884173479384 9.6928e-06 deg
tp 2459276.663498138289
5.3606e-05 TDB
period 1989.132723615581
n .180983398305187 3.4065e-10 deg/d
Q 3.437963394132625 4.314e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3432  
   data-arc span      58775 days (160.92 yr)  
   first obs. used      1860-07-09  
   last obs. used      2021-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5149  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:08:23  

Additional Information
 Earth MOID = 1.77063 au 
 Jupiter MOID = 1.65787 au 
 T_jup = 3.201 
[ 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 6.48   n/a MPCxxxxx IRAS observations used: 19
magnitude slope G 0.18   n/a PDS3 (MPC 17257) Fit
diameter diameter 303.918 km 3.501 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.6304 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Zappala, V.; Di Martino, M.; Cacciatori, S. (1983) Icarus 56, 319-324.]
[Michalowski, T.; Velichko, F.P.; Di Martino, M.; Krugly, et al. (1995) Icarus 118, 292-301.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (1999) Astron. Astrophys. Suppl. Ser. 139, 565-574.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Michalowski, T.; Kwiatkowski, T.; Pych, W.; Kryszczynska, A.; et al. (2004) Astron. Astrophys. 416, 353-366.]
[Behrend, R. (2011) Observatoire de Geneve web site,]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.057   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.679   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=3.33, mean=11.85, max.=20.86) deg.
U-B UB 0.338   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.33, mean=12.40, max.=20.86) deg.
Tholen spectral type spec_T CF   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B C   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)

52 Europa (A858 CA)          Discovered 1858-Feb-04 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A858 CA = 1948 LA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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