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11981 Boncompagni (1995 UY1)
Classification: Main-belt Asteroid          SPK-ID: 2011981
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06354802939130552 3.8525e-08  
a 2.655805103491442 1.3236e-08 au
q 2.487033922717189 9.8981e-08 au
i 4.69099552007325 4.1285e-06 deg
node 321.6486106498758 5.0304e-05 deg
peri 158.9537898823783 6.118e-05 deg
M 211.8927044016723 3.6225e-05 deg
tp 2459850.879254219170
(2022-Sep-28.37925422)
0.00016073 TDB
period 1580.857516660678
4.33
1.1818e-05
3.236e-08
d
yr
n .2277245078737049 1.7024e-09 deg/d
Q 2.824576284265695 1.4078e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1359  
   data-arc span      16233 days (44.44 yr)  
   first obs. used      1976-05-30  
   last obs. used      2020-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50957  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:47:41  

Additional Information
 Earth MOID = 1.50335 au 
 Jupiter MOID = 2.21415 au 
 T_jup = 3.380 
[ 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 14.38   n/a E2021B10  
diameter diameter 4.755 km 0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 152.278 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.179   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11981 Boncompagni           Discovered 1995 Oct. 20 at Osservatorio San Vittore.
Prince Baldassarre Boncompagni (1821-1894) was editor of 20 volumes of Bullettino di Bibliografia e Storia delle Scienze Matematiche e fisiche. This monumental work, published in Rome during 1868-1887, was fundamental in the history of the mathematical and physical sciences, with many articles on the history of astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1995 UY1 = 1997 EZ20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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