+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3905 Doppler (1984 QO) Classification: Main-belt Asteroid          SPK-ID: 2003905 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2546978537296102 6.7495e-08   a 2.561863719607994 1.1801e-08 au q 1.909362528676082 1.7783e-07 au i 14.208225985204 5.683e-06 deg node 343.1375929624161 2.4861e-05 deg peri 91.15856986151475 2.896e-05 deg M 295.7645353246315 1.5674e-05 deg tp 2459663.742072618287 (2022-Mar-25.24207262) 6.6387e-05 TDB period 1497.726320324646 4.10 1.0349e-05 2.833e-08 d yr n .2403643410112247 1.6609e-09 deg/d Q 3.214364910539906 1.4807e-08 au   Orbit Determination Parameters    # obs. used (total)      1655      data-arc span      14902 days (40.80 yr)      first obs. used      1980-09-08      last obs. used      2021-06-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .38834      source      ORB      producer      Otto Matic      solution date      2021-Jul-07 22:48:47   Additional Information  Earth MOID = .984533 au   Jupiter MOID = 2.2667 au   T_jup = 3.347  [ 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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   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, http://obswww.unige.ch/~behrend/page_cou.html] [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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   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.arc Last Updated: 2003-09-26 Alternate Designations  1984 QO = 1980 RP2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-30 19:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin