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18627 Rogerbonnet (1998 DH33)
Classification: Main-belt Asteroid          SPK-ID: 2018627
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07397322147521265 1.837e-08  
a 2.367919303527988 8.645e-09 au
q 2.19275668445268 4.2548e-08 au
i 9.332084284644816 7.5387e-07 deg
node 52.59956398653374 8.2444e-06 deg
peri 300.4735556937727 1.7477e-05 deg
M 235.3452304845673 1.371e-05 deg
tp 2459661.345311085956
(2022-Mar-22.84531109)
5.143e-05 TDB
period 1330.91026228567
3.64
7.2885e-06
1.995e-08
d
yr
n .2704915652102236 1.4813e-09 deg/d
Q 2.543081922603295 9.2845e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1959  
   data-arc span      11461 days (31.38 yr)  
   first obs. used      1989-10-28  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41568  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:41  

Additional Information
 Earth MOID = 1.20431 au 
 Jupiter MOID = 2.73524 au 
 T_jup = 3.525 
[ 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 13.88   n/a E2021B10  
rotation period rot_per 4.46445 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.]

18627 Rogerbonnet           Discovered 1998 Feb. 27 by M. Tombelli and C. Casacci at Cima Ekar.
Roger-Maurice Bonnet (b. 1937) is a French experimental astrophysicist specializing in stellar physics. From 1983 to 2001 he was Science Director of ESA and he created Horizon 2000. Under his lead, ESA launched the scientific projects, Giotto, Hipparcos, ISO, XMM, SOHO, Cluster, Cassini-Huygens and HST.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-03-12Last Updated: 2017-04-19

Alternate Designations
 1998 DH33 = 1989 VV1 = 1999 LD20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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