+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4611 Vulkaneifel (1989 GR6) Classification: Main-belt Asteroid          SPK-ID: 2004611 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1918281014458023 3.9117e-08   a 2.61462353925024 8.5273e-09 au q 2.113065269720363 1.0364e-07 au i 13.79680169136705 3.0407e-06 deg node 116.2173807457494 1.7755e-05 deg peri 274.2266555731012 1.9646e-05 deg M 8.500268786419287 7.4861e-06 deg tp 2459164.037844824744 (2020-Nov-10.53784482) 3.2145e-05 TDB period 1544.230681747844 4.23 7.5545e-06 2.068e-08 d yr n .2331257915381739 1.1405e-09 deg/d Q 3.116181808780118 1.0163e-08 au   Orbit Determination Parameters    # obs. used (total)      2951      data-arc span      20265 days (55.48 yr)      first obs. used      1965-09-27      last obs. used      2021-03-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .37728      source      ORB      producer      Otto Matic      solution date      2021-May-03 21:44:36   Additional Information  Earth MOID = 1.17038 au   Jupiter MOID = 2.46081 au   T_jup = 3.341  [ 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 11.97   n/a E2021B10   diameter diameter 11.266 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 3.756 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Hanowell, J. (2013) Minor Planet Bull. 40, 157.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] [Odden, C.; Carrolo, E.; Freund, G.; Carroll, C.; et al. (2013) Minor Planet Bull. 40, 157-158.] [Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.] [Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.278   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   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) 4611 Vulkaneifel (1989 GR6)          Discovered 1989-Apr-05 by Geffert, M. at La Silla Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1989 GR6 = 1965 SL = 1975 AC1 = 1975 BD = 1980 DN1 = 1980 FW11  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-12 14:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin