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18610 Arthurdent (1998 CC2)
Classification: Main-belt Asteroid          SPK-ID: 2018610
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2137881674132492 5.0128e-08  
a 2.5478863640219 9.7574e-09 au
q 2.003178407480451 1.3012e-07 au
i 5.602013964710111 4.8961e-06 deg
node 319.3035325720111 4.112e-05 deg
peri 140.4543169518915 4.1955e-05 deg
M 251.4310868355829 1.0677e-05 deg
tp 2459648.493278626415
(2022-Mar-09.99327863)
4.5751e-05 TDB
period 1485.485813616555
4.07
8.5333e-06
2.336e-08
d
yr
n .242344959945155 1.3921e-09 deg/d
Q 3.092594320563349 1.1843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1580  
   data-arc span      11753 days (32.18 yr)  
   first obs. used      1988-10-08  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50991  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:17  

Additional Information
 Earth MOID = 1.0235 au 
 Jupiter MOID = 2.07865 au 
 T_jup = 3.403 
[ 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 14.4   n/a MPO474012  
diameter diameter 3.463 km 0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.234   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18610 Arthurdent           Discovered 1998 Feb. 7 at Starkenburg Observatory.
The earthling Arthur Dent is confronted with the adversities of life, the universe and everything in a highly amusing and entertaining way in Douglas Adam's famous five-volume trilogy The Hitch Hiker's Guide to the Galaxy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2143-Aug-07 10:08 < 00:01 Thisb 0.0366588764299627 0.0366576294588984 0.0366601235498044 6.66481165882898 6.66481163092233 2503992.922456151 0.574211372840894 865.983945812911 61.6053327658295 -89.4450513282404 88996.073375392 T 27 CATAB v2.0f-lin.ifort 2021-Apr-13 02:33:21 2021-Apr-13 02:33

Alternate Designations
 1998 CC2 = 1990 EG3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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