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894 Erda (A918 LA)
Classification: Main-belt Asteroid          SPK-ID: 2000894
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .110452661859977 1.286e-08  
a 3.119548460712072 1.199e-08 au
q 2.77498602942523 4.3623e-08 au
i 12.7349601346195 8.7717e-07 deg
node 190.591412476405 4.3676e-06 deg
peri 116.5048836902284 1.0918e-05 deg
M 220.8443080826522 1.2955e-05 deg
tp 2460174.419227780484
(2023-Aug-17.91922778)
7.4465e-05 TDB
period 2012.500661254387
5.51
1.1603e-05
3.177e-08
d
yr
n .1788819288017589 1.0313e-09 deg/d
Q 3.464110891998915 1.3315e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3524  
   data-arc span      41682 days (114.12 yr)  
   first obs. used      1907-05-12  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37356  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:41:31  

Additional Information
 Earth MOID = 1.78967 au 
 Jupiter MOID = 1.90061 au 
 T_jup = 3.169 
[ 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 9.68   n/a MPO614063  
diameter diameter 28.309 km 1.544 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.6897 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Stephens, R.D. (2002) Minor Planet Bull. 29, 2-3.]
[Higgins, D.; Goncalves, R.M.D. (2007) Minor Planet Bull. 34, 16-18.]
geometric albedo albedo 0.120   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

894 Erda (A918 LA)          Discovered 1918-Jun-04 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A918 LA = 1973 QB = A907 JC = A912 HD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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