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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 104 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1105903073288318 2.7495e-08  
a 3.095046894844041 6.5099e-09 au
q 2.752764707546092 8.5034e-08 au
i 7.478546519929819 2.8162e-06 deg
node 128.5992665946191 2.2055e-05 deg
peri 343.2672347568989 2.5355e-05 deg
M 346.1683205412687 1.2723e-05 deg
tp 2459276.913781540091
(2021-Mar-03.41378154)
7.0375e-05 TDB
period 1988.837395813673
5.45
6.2748e-06
1.718e-08
d
yr
n .1810102730156665 5.7108e-10 deg/d
Q 3.437329082141991 7.2298e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3293  
   data-arc span      58636 days (160.54 yr)  
   first obs. used      1860-07-09  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51119  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:42:59  

Additional Information
 Earth MOID = 1.77016 au 
 Jupiter MOID = 1.65837 au 
 T_jup = 3.201 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452345.5 (2002-Mar-12.0) TDB
Reference: JPL 104 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .101323711842093 2.7354e-08  
q 2.786109610524902 8.3537e-08 au
tp 2453304.862128680119
(2004-Oct-26.36212868)
7.4162e-05 TDB
node 129.0226245150362 2.2064e-05 deg
peri 342.7134773733377 2.601e-05 deg
i 7.468527734368801 2.8115e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3293  
   data-arc span      58636 days (160.54 yr)  
   first obs. used      1860-07-09  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51119  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:42:59  

Additional Information
 Jupiter MOID = 1.65837 au 
 T_jup = 3.201 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.482685666491232E-16 -2.279041611552109E-15 -2.786452137476016E-13 -4.066938704226441E-15 -3.98123254436286E-14 -5.39668826319536E-16
q -2.279041611552109E-15 6.978466013525252E-15 8.635248871590347E-13 1.086125527884043E-14 1.204819375971249E-13 1.669468317491231E-15
tp -2.786452137476016E-13 8.635248871590347E-13 5.499992195819428E-9 3.578949685396609E-12 1.032725755455288E-9 9.015576834260253E-13
node -4.066938704226441E-15 1.086125527884043E-14 3.578949685396609E-12 4.868222687248986E-10 -4.816427783029685E-10 -1.103701292939094E-11
peri -3.98123254436286E-14 1.204819375971249E-13 1.032725755455288E-9 -4.816427783029685E-10 6.765368251015039E-10 1.109146503772825E-11
i -5.39668826319536E-16 1.669468317491231E-15 9.015576834260253E-13 -1.103701292939094E-11 1.109146503772825E-11 7.904427624992753E-12

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 6.49   n/a E2021B10 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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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, http://obswww.unige.ch/~behrend/page_cou.html]
[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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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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