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JPL Small-Body Database Browser
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919 Ilsebill (A918 UD)
Classification: Main-belt Asteroid          SPK-ID: 2000919
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08341440346963185 3.4451e-08  
a 2.772058173307303 9.1503e-09 au
q 2.540828594397757 9.8045e-08 au
i 8.165688964263687 3.557e-06 deg
node 229.8325037975314 2.4714e-05 deg
peri 156.0244672859311 3.222e-05 deg
M 14.86123995384378 2.0174e-05 deg
tp 2458930.908774811965
(2020-Mar-22.40877481)
9.4441e-05 TDB
period 1685.784035888127
4.62
8.3469e-06
2.285e-08
d
yr
n .2135504859080838 1.0574e-09 deg/d
Q 3.003287752216849 9.9136e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3020  
   data-arc span      36987 days (101.26 yr)  
   first obs. used      1918-10-30  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44575  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:40:34  

Additional Information
 Earth MOID = 1.54813 au 
 Jupiter MOID = 2.41079 au 
 T_jup = 3.317 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.4   n/a MPO347521  
diameter diameter 33.500 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.0325 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pligge, Z.; Hall, B.; Ditteon, R. (2011) Minor Planet Bull. 38, 137-138.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.047   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

919 Ilsebill (A918 UD)          Discovered 1918-Oct-30 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A918 UD = 1935 JG = 1950 RP = 1950 SE = 1950 TN = 1972 MA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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