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21708 Mulhall (1999 RV90)
Classification: Main-belt Asteroid          SPK-ID: 2021708
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0577068486242351 3.6432e-08  
a 2.619129090781297 1.1269e-08 au
q 2.46798740481225 9.6504e-08 au
i 6.304399112853201 3.8482e-06 deg
node 142.3579002295992 3.135e-05 deg
peri 193.8322633732223 4.4119e-05 deg
M 70.24236402150535 2.9785e-05 deg
tp 2459094.414136764199
(2020-Sep-01.91413676)
0.00012847 TDB
period 1548.223956864455
4.24
9.992e-06
2.736e-08
d
yr
n .2325244990583216 1.5007e-09 deg/d
Q 2.770270776750344 1.1919e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1259  
   data-arc span      8747 days (23.95 yr)  
   first obs. used      1997-01-31  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53742  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:28  

Additional Information
 Earth MOID = 1.45746 au 
 Jupiter MOID = 2.45068 au 
 T_jup = 3.395 
[ 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 14.92   n/a E2021B10  
diameter diameter 5.015 km 0.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.102   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21708 Mulhall           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Michael Mulhall (b. 1987) 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 RV90 = 1998 KS59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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