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JPL Small-Body Database Browser
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2451 Dollfus (1980 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2002451
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1532262414326174 3.774e-08  
a 2.724318379402481 1.2852e-08 au
q 2.30688131366084 1.0585e-07 au
i 8.592101650380467 5.0679e-06 deg
node 331.7737002995975 2.6534e-05 deg
peri 325.3560220363418 3.164e-05 deg
M 330.7508824087765 1.8516e-05 deg
tp 2459133.942904169290
8.4682e-05 TDB
period 1642.423753506984
n .2191882571299339 1.5511e-09 deg/d
Q 3.141755445144123 1.4822e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2326  
   data-arc span      28968 days (79.31 yr)  
   first obs. used      1940-10-07  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43777  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:21:58  

Additional Information
 Earth MOID = 1.29731 au 
 Jupiter MOID = 2.11854 au 
 T_jup = 3.324 
[ 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 11.8   n/a MPO473798  
diameter diameter 11.848 km 0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 48. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site,]
geometric albedo albedo 0.288   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2451 Dollfus           Discovered 1980 Sept. 2 by E. Bowell at the Anderson Mesa station of the Lowell Observatory.
Named in honor of Audouin Dollfus, astronomer at the Observatoire de Paris, Meudon. Dollfus is renowned for his fundamental work on planetary polarimetry and ground-based imaging, including studies of Saturn's rings, the Martian and lunar surfaces, and the Venus atmosphere. Recently he has worked on the polarimetric properties of minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 6531Last Updated: 2006-03-21

Alternate Designations
 1980 RQ = 1935 QS = 1940 TC = 1953 PO = 1953 SC = 1965 CH = 1974 CL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Apr-07 20:51 UT
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