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21683 Segal (1999 RL33)
Classification: Main-belt Asteroid          SPK-ID: 2021683
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1235653931114249 3.244e-08  
a 2.277624989849373 6.5472e-09 au
q 1.99618936261823 7.5032e-08 au
i 5.207133544395902 3.2997e-06 deg
node 329.1966545104568 4.5089e-05 deg
peri 110.2723136429664 4.9688e-05 deg
M 341.9490725225896 1.8176e-05 deg
tp 2459263.453339947799
(2021-Feb-17.95333995)
6.3301e-05 TDB
period 1255.514566194414
3.44
5.4136e-06
1.482e-08
d
yr
n .2867350245813513 1.2364e-09 deg/d
Q 2.559060617080517 7.3562e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1863  
   data-arc span      16018 days (43.85 yr)  
   first obs. used      1977-03-12  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45293  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:53:59  

Additional Information
 Earth MOID = 1.01854 au 
 Jupiter MOID = 2.64284 au 
 T_jup = 3.592 
[ 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 14.61   n/a E2021B10  
diameter diameter 4.293 km 1.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.173   0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21683 Segal           Discovered 1999 Sept. 9 by C. W. Juels at Fountain Hills.
Bruce A. Segal (b. 1959), an eye physician and surgeon in Florida, is also an amateur astronomer. Since 1999 he has participated in an ongoing minor-planet astrometry program at Jupiter Observatory using automated equipment.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031110/MPCPages.arcLast Updated: 2003-11-12

Alternate Designations
 1999 RL33 = 1977 EZ4 = 1979 YP9 = 1989 VL2 = 1998 KF13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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