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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1162009691798267 3.2744e-08  
a 2.745749708220599 8.9281e-09 au
q 2.426690931000139 9.0268e-08 au
i 4.668147003167619 4.2668e-06 deg
node 26.96555445973453 4.4936e-05 deg
peri 43.15861085891756 4.8594e-05 deg
M 325.1722153600626 1.8435e-05 deg
tp 2459161.273029572201
(2020-Nov-07.77302957)		 8.5264e-05 TDB
period 1661.842441153223
4.55		 8.1055e-06
2.219e-08		 d
yr
n .2166270346003324 1.0566e-09 deg/d
Q 3.064808485441059 9.9656e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3144  
   data-arc span      46797 days (128.12 yr)  
   first obs. used      1892-09-25  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:52  

Additional Information
 Earth MOID = 1.44335 au 
 Jupiter MOID = 2.2067 au 
 T_jup = 3.333 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456116.5 (2012-Jul-08.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1153729221971502 3.2684e-08  
q 2.428981591348292 8.9944e-08 au
tp 2455826.658475149933
(2011-Sep-22.15847515)		 8.4089e-05 TDB
node 27.0704277014158 4.478e-05 deg
peri 41.33468177604679 4.8577e-05 deg
i 4.678655970610423 4.2729e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3144  
   data-arc span      46797 days (128.12 yr)  
   first obs. used      1892-09-25  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:52  

Additional Information
 Jupiter MOID = 2.2067 au 
 T_jup = 3.333 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.068274247554059E-15 -2.928238540451725E-15 -4.365832050632118E-13 -1.023847673995322E-15 -1.014287561951765E-13 -7.929166392843648E-17
q -2.928238540451725E-15 8.089912130411508E-15 1.244925026974195E-12 2.048394896430059E-15 2.899875830269156E-13 2.549777851576568E-16
tp -4.365832050632118E-13 1.244925026974195E-12 7.070943332853675E-9 -8.226271584437531E-12 1.596236555394169E-9 -9.064443634990398E-13
node -1.023847673995322E-15 2.048394896430059E-15 -8.226271584437531E-12 2.005257810988942E-9 -2.000085639887129E-9 -2.488023671099814E-11
peri -1.014287561951765E-13 2.899875830269156E-13 1.596236555394169E-9 -2.000085639887129E-9 2.359677208714602E-9 2.45796767114727E-11
i -7.929166392843648E-17 2.549777851576568E-16 -9.064443634990398E-13 -2.488023671099814E-11 2.45796767114727E-11 1.825792952416298E-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. 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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