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8785 Boltwood (1978 RR1)
Classification: Main-belt Asteroid          SPK-ID: 2008785
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1736587407219468 3.1898e-08  
a 2.272254731649352 5.7305e-09 au
q 1.877657836351641 7.2044e-08 au
i 3.395217337183351 3.5103e-06 deg
node 149.3563837347678 4.628e-05 deg
peri 161.40045285 4.7072e-05 deg
M 212.0496450304259 8.521e-06 deg
tp 2459910.659023709182
(2022-Nov-27.15902371)
2.9935e-05 TDB
period 1251.076745124205
3.43
4.7327e-06
1.296e-08
d
yr
n .2877521314363971 1.0885e-09 deg/d
Q 2.666851626947064 6.7256e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2237  
   data-arc span      15591 days (42.69 yr)  
   first obs. used      1978-09-01  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48409  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:52:26  

Additional Information
 Earth MOID = .863117 au 
 Jupiter MOID = 2.59093 au 
 T_jup = 3.589 
[ 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 14.46   n/a MPCxxxxx  
diameter diameter 3.006 km 0.495 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.373   0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8785 Boltwood           Discovered 1978 Sept. 5 by N. S. Chernykh at the Crimean Astrophysical Observatory.
Paul Boltwood (b. 1943) is a Canadian specialist in computer systems and outstanding amateur astronomer. He monitored the peculiar object OJ 287 for some two years. He also obtained deep-sky CCD images with limiting magnitude 24.5 using a home-built 0.4-m reflector.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1978 RR1 = 1985 UA3 = 1997 AO13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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