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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165598583238662 1.9197e-08  
a 2.746814102043273 7.8921e-09 au
q 2.426645839467112 5.4545e-08 au
i 4.667682287404289 2.3658e-07 deg
node 26.95742357431409 2.6256e-06 deg
peri 43.14036949654763 5.9161e-06 deg
M 50.94634196451727 3.9311e-06 deg
tp 2459161.183253577182
(2020-Nov-07.68325358)
1.7923e-05 TDB
period 1662.808858214307
4.55
7.1663e-06
1.962e-08
d
yr
n .2165011319380416 9.3307e-10 deg/d
Q 3.066982364619435 8.812e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3506  
   data-arc span      46998 days (128.67 yr)  
   first obs. used      1892-09-25  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40984  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:54:52  

Additional Information
 Earth MOID = 1.44304 au 
 Jupiter MOID = 2.20546 au 
 T_jup = 3.333 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456606.5 (2013-Nov-10.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1151181990172189 1.8909e-08  
q 2.430851974567028 5.3531e-08 au
tp 2455827.310149441428
(2011-Sep-22.81014944)
2.1031e-05 TDB
node 27.07163277526143 2.6163e-06 deg
peri 41.55508371090765 6.0572e-06 deg
i 4.677342935047719 2.365e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3506  
   data-arc span      46998 days (128.67 yr)  
   first obs. used      1892-09-25  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40984  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:54:52  

Additional Information
 Jupiter MOID = 2.20546 au 
 T_jup = 3.333 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.575357443466581E-16 -1.003889262308762E-15 9.223413208032581E-15 -1.940603952557303E-15 2.930460689830466E-14 -9.617093657395679E-16
q -1.003889262308762E-15 2.865615065343581E-15 -1.014728942228483E-13 4.620378469189844E-15 -9.009285274625487E-14 2.649545842653186E-15
tp 9.223413208032581E-15 -1.014728942228483E-13 4.422905992769651E-10 -2.032763496681822E-11 1.107105637119054E-10 2.799472652856967E-12
node -1.940603952557303E-15 4.620378469189844E-15 -2.032763496681822E-11 6.845064243761769E-12 -1.079360838097857E-11 -6.459105853214175E-14
peri 2.930460689830466E-14 -9.009285274625487E-14 1.107105637119054E-10 -1.079360838097857E-11 3.669005945186532E-11 6.859966629116223E-13
i -9.617093657395679E-16 2.649545842653186E-15 2.799472652856967E-12 -6.459105853214175E-14 6.859966629116223E-13 5.593179823461164E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.99   n/a MPCxxxxx 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. 2020-October); 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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