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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237081070860803 3.2389e-08  
a 2.27797971266006 6.5421e-09 au
q 1.996175154426391 7.4921e-08 au
i 5.2071601271925 3.2679e-06 deg
node 329.1957125819202 4.4818e-05 deg
peri 110.2667891166215 4.9376e-05 deg
M 38.14457104239759 1.7938e-05 deg
tp 2459263.438186095925
(2021-Feb-17.93818610)
6.2758e-05 TDB
period 1255.807882915337
3.44
5.4098e-06
1.481e-08
d
yr
n .286668052412815 1.2349e-09 deg/d
Q 2.55978427089373 7.3514e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1939  
   data-arc span      16133 days (44.17 yr)  
   first obs. used      1977-03-12  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45331  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:17  

Additional Information
 Earth MOID = 1.01883 au 
 Jupiter MOID = 2.64242 au 
 T_jup = 3.592 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457387.5 (2015-Dec-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1238399731754881 3.2496e-08  
q 1.995499990286251 7.5118e-08 au
tp 2458005.144285241169
(2017-Sep-08.64428524)
6.454e-05 TDB
node 329.3120588791052 4.4862e-05 deg
peri 109.5565112036205 4.9392e-05 deg
i 5.204766888303095 3.2683e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1939  
   data-arc span      16133 days (44.17 yr)  
   first obs. used      1977-03-12  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45331  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:17  

Additional Information
 Jupiter MOID = 2.64242 au 
 T_jup = 3.592 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.055982370448117E-15 -2.434271466786569E-15 -5.400199632607067E-13 2.785695259633983E-15 -1.417465709409513E-13 -2.659085705231403E-15
q -2.434271466786569E-15 5.642783421575501E-15 1.092934890711769E-12 -5.231051221062838E-15 2.736465404465169E-13 6.140359010226472E-15
tp -5.400199632607067E-13 1.092934890711769E-12 4.165415414463406E-9 -1.138583991153885E-11 1.347485897605341E-9 4.131342115448876E-12
node 2.785695259633983E-15 -5.231051221062838E-15 -1.138583991153885E-11 2.012579339909786E-9 -2.008003383438201E-9 5.29014154919229E-11
peri -1.417465709409513E-13 2.736465404465169E-13 1.347485897605341E-9 -2.008003383438201E-9 2.439553477976953E-9 -5.146974106748993E-11
i -2.659085705231403E-15 6.140359010226472E-15 4.131342115448876E-12 5.29014154919229E-11 -5.146974106748993E-11 1.068201543894707E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.62   n/a MPCxxxxx  
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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