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18877 Stevendodds (1999 XP7)
Classification: Main-belt Asteroid          SPK-ID: 2018877
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2554718255844631 1.9997e-08  
a 2.559635370717974 7.5834e-09 au
q 1.905720649730089 5.2913e-08 au
i 7.98630064095295 7.7751e-07 deg
node 65.93007966340801 9.596e-06 deg
peri 19.63675659334305 8.8351e-06 deg
M 54.75276740163026 3.814e-06 deg
tp 2458973.006414654821
(2020-May-03.50641465)
1.5241e-05 TDB
period 1495.772626861338
4.10
6.6473e-06
1.82e-08
d
yr
n .2406782912957886 1.0696e-09 deg/d
Q 3.213550091705858 9.5208e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1998  
   data-arc span      24145 days (66.11 yr)  
   first obs. used      1955-01-26  
   last obs. used      2021-03-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44248  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:04:41  

Additional Information
 Earth MOID = .92349 au 
 Jupiter MOID = 2.04925 au 
 T_jup = 3.376 
[ 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 13.67   n/a E2021B10  
diameter diameter 4.976 km 0.796 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.311   0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18877 Stevendodds           Discovered 1999 Dec. 4 by C. W. Juels at Fountain Hills.
Steven L. Dodds (b. 1961) has been furnishing telescope optics for the astronomical community since 1986. He constructed two parabolic off-axis segments (adaptive optic components) used in the Gemini North 8.1-meter telescope located on Mauna Kea.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010804/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1999 XP7 = 1955 BE = 1962 WF2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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