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20623 Davidyoung (1999 TS11)
Classification: Main-belt Asteroid          SPK-ID: 2020623
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1906307778730699 2.5044e-08  
a 2.643593630367481 8.9562e-09 au
q 2.139643320230235 6.8691e-08 au
i 12.63162390283227 7.4045e-07 deg
node 326.2859649696132 3.0009e-06 deg
peri 22.95832308893703 5.582e-06 deg
M 359.0324849712616 2.7892e-06 deg
tp 2459204.719351350019
(2020-Dec-21.21935135)
1.2173e-05 TDB
period 1569.966812802464
4.30
7.9783e-06
2.184e-08
d
yr
n .2293042101682285 1.1653e-09 deg/d
Q 3.147543940504726 1.0663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2169  
   data-arc span      11153 days (30.54 yr)  
   first obs. used      1990-07-26  
   last obs. used      2021-02-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41586  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:25:11  

Additional Information
 Earth MOID = 1.13596 au 
 Jupiter MOID = 2.2841 au 
 T_jup = 3.334 
[ 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 13.30   n/a E2021B10  
diameter diameter 6.157 km 0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 19.936 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.294   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20623 Davidyoung           Discovered 1999 Oct. 10 by M. Abraham and G. Fedon at the Everstar Observatory.
David Young (b. 1955) has been for many years a great contributor to the astronomy community. He has always been there to help and has selflessly given countless hours to education, public programs and scientific research. He has often donated equipment and his technical expertise whenever and however needed.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1999 TS11 = 1990 OG2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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