+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1335 Demoulina (1934 RE) Classification: Main-belt Asteroid          SPK-ID: 2001335 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1544744860248467 6.9943e-09   a 2.239988375596354 4.1827e-09 au q 1.893967322574476 1.5262e-08 au i 2.547544302339687 3.0143e-07 deg node 172.6080234245736 6.5788e-06 deg peri 198.8158826798751 1.1717e-05 deg M 248.4592197271043 6.8893e-06 deg tp 2459579.900807766779 (2021-Dec-31.40080777) 2.3796e-05 TDB period 1224.523357841617 3.35 3.4298e-06 9.39e-09 d yr n .2939919420030885 8.2345e-10 deg/d Q 2.586009428618232 4.8288e-09 au   Orbit Determination Parameters    # obs. used (total)      3059      data-arc span      31608 days (86.54 yr)      first obs. used      1934-09-07      last obs. used      2021-03-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .43204      source      ORB      producer      Otto Matic      solution date      2021-May-03 19:24:09   Additional Information  Earth MOID = .89247 au   Jupiter MOID = 2.87812 au   T_jup = 3.618  [ 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 12.94   n/a E2021B10   diameter diameter 7.484 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 74.86 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: [Molnar, L.A.; Haegert, M.J. (2007) Minor Planet Bull. 34, 126-128.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] geometric albedo albedo 0.218   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1335 Demoulina (1934 RE)          Discovered 1934-Sep-07 by Reinmuth, K. at Heidelberg Independent discovery Sept. 13 by E. Delporte, Uccle, was announced first. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1934 RE = 1954 RA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-22 08:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin