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JPL Small-Body Database Browser
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928 Hildrun (A920 DC)
Classification: Main-belt Asteroid          SPK-ID: 2000928
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.


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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 .1483500317159092 3.8732e-08  
a 3.134855634401499 1.1434e-08 au
q 2.66979970161324 1.2326e-07 au
i 17.65329281583379 4.2423e-06 deg
node 129.833822141209 1.3415e-05 deg
peri 21.89426976418258 1.8652e-05 deg
M 9.245349535899816 1.2873e-05 deg
tp 2458948.435035147900
(2020-Apr-08.93503515)
7.2456e-05 TDB
period 2027.331392282682
5.55
1.1092e-05
3.037e-08
d
yr
n .1775733367373434 9.7152e-10 deg/d
Q 3.599911567189758 1.313e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2568  
   data-arc span      36591 days (100.18 yr)  
   first obs. used      1920-02-23  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .386  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:15:39  

Additional Information
 Earth MOID = 1.68939 au 
 Jupiter MOID = 1.4618 au 
 T_jup = 3.123 
[ 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 10.0   n/a MPO502161  
diameter diameter 62.817 km 0.293 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.13 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2004) Minor Planet Bull. 31, 85-88.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.053   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

928 Hildrun (A920 DC)          Discovered 1920-Feb-23 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A920 DC = 1959 EE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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