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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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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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104234558003196 3.4714e-08  
a 3.1196920212297 1.3713e-08 au
q 2.775204847212832 1.0508e-07 au
i 12.73270349222695 4.0031e-06 deg
node 190.6098126674255 1.7782e-05 deg
peri 116.3312827305293 2.5994e-05 deg
M 150.2029364760269 1.92e-05 deg
tp 2458160.765623081134
(2018-Feb-11.26562308)
0.00010632 TDB
period 2012.639584706395
5.51
1.327e-05
3.633e-08
d
yr
n .1788695813873287 1.1794e-09 deg/d
Q 3.464179195246567 1.5227e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3019  
   data-arc span      41462 days (113.52 yr)  
   first obs. used      1907-05-12  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4008  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:59  

Additional Information
 Earth MOID = 1.79056 au 
 Jupiter MOID = 1.90175 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 9.7   n/a MPO502161  
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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1954-Mar-23 13:44 00:01 Jupiter 1.96230733649929 1.96230680199778 1.9623078710008 2.58207850221896 2.40911539379857 2434825.072464021 1.28455287521651 61.9651319802228 34.8999166504662 -84.638779653571 2423174.20517363 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57
1964-May-11 15:30 < 00:01 Jupiter 1.93765878440824 1.93765838077969 1.93765918803701 4.8644692718146 4.77376027082021 2438527.146039754 0.876554347646424 87.3526165071597 17.3284062644429 -85.6672955023751 3969614.44285299 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57
2036-Feb-07 10:58 < 00:01 Jupiter 1.92207559156753 1.92207519264967 1.92207599048539 4.20185673717774 4.09563642242182 2464730.956941165 0.483180689740927 55.7513028773737 18.1079778886332 89.3363089663985 3348237.85235555 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57
2107-Nov-19 16:30 00:02 Jupiter 1.94685566123673 1.94685520900787 1.9468561134657 3.31627939398561 3.18238352275041 2490948.187487471 1.9566173872886 94.2645240093797 20.7180725164092 78.0733424269569 1877594.41239638 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57
2179-Sep-21 01:48 00:04 Jupiter 1.98566083507748 1.98566031127879 1.98566135887639 2.41006405065851 2.22604347685655 2517186.574969876 3.68624959050787 75.6454558553983 45.7212664136407 -35.8468600482437 1273846.335217 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57
2189-Oct-29 17:32 00:03 Jupiter 1.96279771414499 1.96279714117517 1.96279828712351 4.84350100613453 4.75356973936598 2520878.230722961 3.22031611555608 279.570914827817 17.7294310242369 -86.7679526997463 3927396.89992631 T 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57

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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