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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09646211903853481 4.5433e-08  
a 2.391184273859952 1.0105e-08 au
q 2.160525571791801 1.0921e-07 au
i 7.056079043989723 5.4475e-06 deg
node 7.835945230104395 2.9712e-05 deg
peri 51.69655615259893 3.8623e-05 deg
M 213.8350793535154 2.6034e-05 deg
tp 2459748.851012798295
(2022-Jun-18.35101280)
9.9579e-05 TDB
period 1350.572789519274
3.70
8.5614e-06
2.344e-08
d
yr
n .2665535710430974 1.6897e-09 deg/d
Q 2.621842975928103 1.108e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      10115 days (27.69 yr)  
   first obs. used      1992-10-01  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50072  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:34:26  

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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