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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1737002642846878 3.2197e-08  
a 2.271934917796087 6.0243e-09 au
q 1.877299222137296 7.2944e-08 au
i 3.394792228466377 3.7405e-06 deg
node 149.3625703991466 5.1205e-05 deg
peri 161.3062656658016 5.227e-05 deg
M 98.20702626002863 9.5551e-06 deg
tp 2458659.281698922455
(2019-Jun-24.78169892)
3.3323e-05 TDB
period 1250.812625795931
3.42
4.975e-06
1.362e-08
d
yr
n .2878128926552215 1.1448e-09 deg/d
Q 2.666570613454878 7.0708e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1932  
   data-arc span      15393 days (42.14 yr)  
   first obs. used      1978-09-01  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:18:26  

Additional Information
 Earth MOID = .863343 au 
 Jupiter MOID = 2.59224 au 
 T_jup = 3.589 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO435782  
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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