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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1736575060651656 3.19e-08  
a 2.27226937915862 5.7309e-09 au
q 1.877672745665692 7.2058e-08 au
i 3.394931503865006 3.5151e-06 deg
node 149.3579789442989 4.6705e-05 deg
peri 161.3643863832868 4.7509e-05 deg
M 155.698816209811 8.5526e-06 deg
tp 2458659.408189684155
(2019-Jun-24.90818968)
2.9584e-05 TDB
period 1251.088842263334
3.43
4.7331e-06
1.296e-08
d
yr
n .2877493490779817 1.0886e-09 deg/d
Q 2.666866012651548 6.7262e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2204  
   data-arc span      15535 days (42.53 yr)  
   first obs. used      1978-09-01  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48337  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:53:05  

Additional Information
 Earth MOID = .86173 au 
 Jupiter MOID = 2.59167 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 14.45   n/a E2021B10  
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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