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11505 (1990 DW2)
Classification: Outer Main-belt Asteroid          SPK-ID: 2011505
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02359567021553123 3.4358e-08  
a 3.374692565664925 2.0835e-08 au
q 3.29506443280669 1.1837e-07 au
i 1.95702892080861 4.284e-06 deg
node 336.1952794900498 0.00010504 deg
peri 319.714830638559 0.00013698 deg
M 175.6259211147894 8.7413e-05 deg
tp 2457895.821597392975
(2017-May-22.32159739)
0.00055183 TDB
period 2264.382287160229
6.20
2.097e-05
5.741e-08
d
yr
n .1589837555439799 1.4723e-09 deg/d
Q 3.454320698523159 2.1326e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2123  
   data-arc span      15587 days (42.67 yr)  
   first obs. used      1978-03-15  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4756  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:46:12  

Additional Information
 Earth MOID = 2.27943 au 
 Jupiter MOID = 1.5989 au 
 T_jup = 3.151 
[ 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 12.6   n/a MPO502257  
diameter diameter 16.840 km 0.564 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.94920 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.075   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11505 (1990 DW2)          Discovered 1990-Feb-24 by Debehogne, H. at La Silla
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 DW2 = 1978 EG10 = 1993 SF13 = 1994 WR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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