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9812 Danco (1998 SJ144)
Classification: Main-belt Asteroid          SPK-ID: 2009812
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1327287028741212 5.6826e-08  
a 2.264177761357709 1.5018e-08 AU
q 1.963656384016268 1.2651e-07 AU
i 6.232405107129501 6.1817e-06 deg
node 189.6581833723593 5.459e-05 deg
peri 267.6407830968517 6.0208e-05 deg
M 208.9466374531661 2.6889e-05 deg
tp 2457522.646178941065
(2016-May-14.14617894)
9.5563e-05 JED
period 1244.412049155825
3.41
1.2381e-05
3.39e-08
d
yr
n .2892932451467456 2.8783e-09 deg/d
Q 2.564699138699149 1.7011e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      887  
   data-arc span      11982 days (32.80 yr)  
   first obs. used      1981-10-24  
   last obs. used      2014-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51102  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:16:12  

Additional Information
 Earth MOID = .991813 AU 
 T_jup = 3.598 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1 mag n/a MPO302126  

9812 Danco           Discovered 1998 Sept. 18 by E. W. Elst at the European Southern Observatory.
Emile Danco (1869-1898), who participated in the Antarctic expedition of Adrien de Gerlache, was responsible for the photography and observation of geomagnetism. He died during the trip, and his body was buried at sea near a newly discovered land, named Dancoland.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1998 SJ144 = 1981 UD17 = 1991 RH15 = 1993 FG44 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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