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340 Eduarda (A892 SD)
Classification: Main-belt Asteroid          SPK-ID: 2000340
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1162009692309986 3.2749e-08  
a 2.745749708133077 8.9621e-09 au
q 2.426690930782282 9.0294e-08 au
i 4.668146949055657 4.2753e-06 deg
node 26.96555500424104 4.5015e-05 deg
peri 43.15861018528827 4.8688e-05 deg
M 325.1722155256093 1.8525e-05 deg
tp 2459161.273028800312
(2020-Nov-07.77302880)
8.5684e-05 TDB
period 1661.842441073765
4.55
8.1364e-06
2.228e-08
d
yr
n .21662703461069 1.0606e-09 deg/d
Q 3.064808485483872 1.0004e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3136  
   data-arc span      46787 days (128.10 yr)  
   first obs. used      1892-09-25  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42265  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:30:42  

Additional Information
 Earth MOID = 1.44335 au 
 Jupiter MOID = 2.2067 au 
 T_jup = 3.333 
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Orbital Elements at Epoch 2456109.5 (2012-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1153743417580118 3.269e-08  
q 2.428973825198018 8.9979e-08 au
tp 2455826.654655268149
(2011-Sep-22.15465527)
8.4384e-05 TDB
node 27.07041584042713 4.4859e-05 deg
peri 41.33347437725647 4.867e-05 deg
i 4.678656408032583 4.2814e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3136  
   data-arc span      46787 days (128.10 yr)  
   first obs. used      1892-09-25  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42265  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:30:42  

Additional Information
 Jupiter MOID = 2.2067 au 
 T_jup = 3.333 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.068654557717723E-15 -2.929801533493753E-15 -4.410782575467308E-13 -1.06440588765522E-15 -1.02306000892532E-13 -7.389839367239698E-17
q -2.929801533493753E-15 8.096152153476248E-15 1.262465300732934E-12 2.136302398269306E-15 2.934734819538876E-13 2.399809065027822E-16
tp -4.410782575467308E-13 1.262465300732934E-12 7.120632608027206E-9 -8.383048404396544E-12 1.606497092803905E-9 -9.071323467563044E-13
node -1.06440588765522E-15 2.136302398269306E-15 -8.383048404396544E-12 2.012326454037976E-9 -2.007160587975754E-9 -2.559547866206985E-11
peri -1.02306000892532E-13 2.934734819538876E-13 1.606497092803905E-9 -2.007160587975754E-9 2.368812987039534E-9 2.529215377909595E-11
i -7.389839367239698E-17 2.399809065027822E-16 -9.071323467563044E-13 -2.559547866206985E-11 2.529215377909595E-11 1.83304249357695E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.90   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
diameter diameter 28.025 km 0.456 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.0062 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Lagerkvist, C.-I. (1978) Astron. Astrophys. Suppl. Ser. 31, 361-381.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.]
[Sada, P.V.; Warner, B.D. (2007) Minor Planet Bull. 34, 37-38.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.247   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a medium resolution spectrum published by Chapman and Gaffey (1979)

340 Eduarda (A892 SD)          Discovered 1892-Sep-25 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A892 SD = 1954 FA = 1959 JT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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