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21789 Frankwasser (1999 SH7)
Classification: Main-belt Asteroid          SPK-ID: 2021789
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1658908135559739 1.1255e-08  
a 2.287105075318284 5.528e-09 au
q 1.907695353685737 2.6805e-08 au
i 6.392494112170495 4.3278e-07 deg
node 107.9885759668462 7.9982e-06 deg
peri 293.5191383787147 9.2645e-06 deg
M 7.641666270292422 5.2013e-06 deg
tp 2459173.682816133688
(2020-Nov-20.18281613)
1.8247e-05 TDB
period 1263.361399254491
3.46
4.5804e-06
1.254e-08
d
yr
n .2849540916893898 1.0331e-09 deg/d
Q 2.666514796950831 6.4451e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2192  
   data-arc span      11394 days (31.20 yr)  
   first obs. used      1989-12-22  
   last obs. used      2021-03-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47106  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 03:04:36  

Additional Information
 Earth MOID = .926166 au 
 Jupiter MOID = 2.73709 au 
 T_jup = 3.575 
[ 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 14.37   n/a E2021B10  
diameter diameter 3.269 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.379   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21789 Frankwasser           Discovered 1999 Sept. 29 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Francis Wasser (b. 1988) was awarded first place in the 2005 Intel International Science and Engineering Fair for his physics team project. He attends the Synge Street CBS Secondary School, Dublin, Ireland.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

Alternate Designations
 1999 SH7 = 1989 YJ = 1998 HX116 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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