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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02359566727969538 3.4523e-08  
a 3.37469256307628 2.1751e-08 au
q 3.29506444018667 1.1885e-07 au
i 1.957028941346257 4.3465e-06 deg
node 336.1952722357737 0.00010743 deg
peri 319.7148455750563 0.00014115 deg
M 175.6259141038556 9.0628e-05 deg
tp 2457895.821642762462
(2017-May-22.32164276)
0.0005728 TDB
period 2264.382284554801
6.20
2.1892e-05
5.994e-08
d
yr
n .1589837557269088 1.5371e-09 deg/d
Q 3.45432068596589 2.2265e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2015  
   data-arc span      15299 days (41.89 yr)  
   first obs. used      1978-03-15  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47934  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:03:57  

Additional Information
 Earth MOID = 2.27943 au 
 Jupiter MOID = 1.5989 au 
 T_jup = 3.151 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456450.5 (2013-Jun-07.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02315752089887252 3.3108e-08  
q 3.298626178137598 1.1132e-07 au
tp 2455511.122099105334
(2010-Nov-10.62209911)
0.00060686 TDB
node 336.5838777646752 0.00010824 deg
peri 300.800568641257 0.00014458 deg
i 1.951467648211462 4.3246e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2015  
   data-arc span      15299 days (41.89 yr)  
   first obs. used      1978-03-15  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47934  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:03:57  

Additional Information
 Jupiter MOID = 1.5989 au 
 T_jup = 3.151 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.096172620713871E-15 -3.622570722955226E-15 1.074898856260156E-12 -3.986454219315658E-15 1.626783020349302E-13 -1.244960965603603E-16
q -3.622570722955226E-15 1.239282374648048E-14 -5.404104493445648E-12 2.24481941146806E-14 -8.069142604142961E-13 3.344897884326255E-16
tp 1.074898856260156E-12 -5.404104493445648E-12 3.682737340176909E-7 1.202206839059363E-10 5.817735534349498E-8 -4.112487287838779E-12
node -3.986454219315658E-15 2.24481941146806E-14 1.202206839059363E-10 1.171559371542853E-8 -1.168986723727786E-8 5.537251483847865E-11
peri 1.626783020349302E-13 -8.069142604142961E-13 5.817735534349498E-8 -1.168986723727786E-8 2.090316893614682E-8 -5.610172704909801E-11
i -1.244960965603603E-16 3.344897884326255E-16 -4.112487287838779E-12 5.537251483847865E-11 -5.610172704909801E-11 1.870247080016622E-11

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. 2019-August); 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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