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70207 Davidunlap (1999 RP33)
Classification: Main-belt Asteroid          SPK-ID: 2070207
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0964621203793895 4.5297e-08  
a 2.391184273014653 1.0031e-08 au
q 2.160525567821811 1.0879e-07 au
i 7.056079305294985 5.4069e-06 deg
node 7.835945283275974 2.9706e-05 deg
peri 51.69655417655998 3.8442e-05 deg
M 213.8350816208468 2.5686e-05 deg
tp 2459748.851004001426
(2022-Jun-18.35100400)
9.8229e-05 TDB
period 1350.57278880312
3.70
8.4989e-06
2.327e-08
d
yr
n .26655357118444 1.6774e-09 deg/d
Q 2.621842978207495 1.0999e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1194  
   data-arc span      10115 days (27.69 yr)  
   first obs. used      1992-10-01  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49936  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:48:08  

Additional Information
 Earth MOID = 1.17918 au 
 Jupiter MOID = 2.64804 au 
 T_jup = 3.515 
[ 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 15.17   n/a E2021B10  
diameter diameter 2.376 km 0.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.260   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70207 Davidunlap           Discovered 1999 Sept. 4 by M. Collins and M. White at Anza.
David Alexander Dunlap (1863-1924), born in Pembroke, Ontario, a mining magnate, philanthropist and amateur astronomer, was the namesake of the David Dunlap Observatory, location of Canada's largest optical telescope, and where the first black-hole candidate Cygnus X-1 was discovered and confirmed.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090409/MPCPages.arcLast Updated: 2009-04-10

Alternate Designations
 1999 RP33 = 2001 CW8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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