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3905 Doppler (1984 QO)
Classification: Main-belt Asteroid          SPK-ID: 2003905
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2552336284344103 7.1289e-08  
a 2.563006237738871 1.2013e-08 au
q 1.908840855980752 1.8791e-07 au
i 14.19844860055181 5.8608e-06 deg
node 343.1599432265299 2.6848e-05 deg
peri 91.03852297848711 3.1047e-05 deg
M 248.8449341488407 1.5795e-05 deg
tp 2459663.253466904772
6.7927e-05 TDB
period 1498.72834683747
n .2402036371432163 1.6888e-09 deg/d
Q 3.217171619496991 1.5079e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1603  
   data-arc span      14595 days (39.96 yr)  
   first obs. used      1980-09-08  
   last obs. used      2020-08-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38883  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:42:49  

Additional Information
 Earth MOID = .983671 au 
 Jupiter MOID = 2.26499 au 
 T_jup = 3.346 
[ 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 12.73   n/a E2021B10  
diameter diameter 8.021 km 0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 50.8 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Franco, L.; Hayes-Gehrke, M.; Bartek, A.; Basile, T.; et al. (2013) CBET 3755.]
[Hayes-Gehrke, M.N.; Maroulis, M.; Bartek, A.; Garcia, E.; et al. (2014) Minor Planet Bull. 41, 72.]
[Behrend, R. (2017) Observatoire de Geneve web site,]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.228   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

3905 Doppler           Discovered 1984 Aug. 28 by A. Mrkos at Klet.
Named in memory of the Austrian physicist Christian Doppler (1803-1853), professor of mathematics and geometry at the Technical University in Prague and later the first director of the Physical Institute in Vienna. The well-known effect relating a shift in observed wavelength to the relative motion of source and observer was formulated by Doppler in Prague in his book Ueber das farbige Licht der Doppelsterne (1842). Name suggested by J. Ticha and M. Šolc.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19960828/MPCPages.arcLast Updated: 2003-09-26

Alternate Designations
 1984 QO = 1980 RP2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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