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354 Eleonora (A893 BC)
Classification: Main-belt Asteroid          SPK-ID: 2000354
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 .1136122756371707 2.0894e-08  
a 2.798268394151583 4.3812e-09 au
q 2.48035075404845 5.8363e-08 au
i 18.4013741996745 2.4001e-06 deg
node 140.3507815038978 9.7575e-06 deg
peri 5.657772695030409 1.701e-05 deg
M 100.5044905428147 1.5014e-05 deg
tp 2458723.173612733656
(2019-Aug-27.67361273)
7.083e-05 TDB
period 1709.749469777983
4.68
4.0154e-06
1.099e-08
d
yr
n .2105571642883722 4.945e-10 deg/d
Q 3.116186034254716 4.879e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2897  
   data-arc span      46787 days (128.10 yr)  
   first obs. used      1893-01-18  
   last obs. used      2021-02-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58483  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:44:58  

Additional Information
 Earth MOID = 1.49323 au 
 Jupiter MOID = 1.90542 au 
 T_jup = 3.242 
[ 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 6.35   n/a E2021B10 IRAS observations used: 42
magnitude slope G 0.37   n/a PDS3 (MPC 17258) Fit
diameter diameter 148.970 km 0.425 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.277 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 529-546.]
[Chang, Y.C.; Chang, C.-s. (1963) Acta Astron. Sin. 11, 139-149.]
[Zappala, V.; van Houten-Groeneveld, I.; van Houten, C.J. (1979) Astron. Astrophys. Suppl. Ser. 35, 213-221.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Ivarsen, K.; Willis, S.; Ingleby, L.; Matthews, D.; Simet, M. (2004) Minor Planet Bull. 31, 29-33.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.201   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.949   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=53; phase (min.=1.54, mean=10.24, max.=20.96) deg.
U-B UB 0.601   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=35; phase (min.=1.85, mean=9.20, max.=20.78) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sl   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)

354 Eleonora (A893 BC)          Discovered 1893-Jan-17 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A893 BC = A918 RF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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