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121016 Christopharnold (1999 BW3)
Classification: Main-belt Asteroid          SPK-ID: 2121016
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2823734828720108 7.1043e-08  
a 2.323380293986411 9.1839e-09 au
q 1.667319308337272 1.6912e-07 au
i 26.24627411810683 6.0807e-06 deg
node 98.37740956561673 1.4297e-05 deg
peri 331.2162534493221 1.8012e-05 deg
M 92.03833921961163 1.0792e-05 deg
tp 2458869.791656574757
(2020-Jan-21.29165657)
3.7591e-05 TDB
period 1293.537069905313
3.54
7.6697e-06
2.1e-08
d
yr
n .2783066742929541 1.6501e-09 deg/d
Q 2.979441279635551 1.1777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      704  
   data-arc span      16339 days (44.73 yr)  
   first obs. used      1976-07-27  
   last obs. used      2021-04-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54946  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:04:22  

Additional Information
 Earth MOID = .708967 au 
 Jupiter MOID = 2.34964 au 
 T_jup = 3.389 
[ 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 15.48   n/a E2021B55  
diameter diameter 2.175 km 0.310 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

121016 Christopharnold           Discovered 1999 Jan. 18 by J. Kandler at Drebach.
Christoph Arnold (1650-1695) was a German amateur astronomer. Born in Sommerfeld near Leipzig, Arnold was a farmer by profession. He observed the 1690 transit of Mercury and made observations of the comets of 1683 and 1686.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20121029/MPCPages.arcLast Updated: 2013-03-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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