+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1544146547572283 3.6284e-08   a 2.239968517091497 4.5432e-09 au q 1.894084551857753 8.0946e-08 au i 2.547512248329347 3.6429e-06 deg node 172.6089733724296 6.5631e-05 deg peri 198.8480802914131 6.628e-05 deg M 189.6143847161965 1.028e-05 deg tp 2459580.051086707390 (2021-Dec-31.55108671) 3.567e-05 TDB period 1224.507073951876 3.35 3.7254e-06 1.02e-08 d yr n .29399585160269 8.9445e-10 deg/d Q 2.585852482325242 5.2448e-09 au   Orbit Determination Parameters    # obs. used (total)      3010      data-arc span      31377 days (85.91 yr)      first obs. used      1934-09-07      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43171      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:32:29   Additional Information  Earth MOID = .894095 au   Jupiter MOID = 2.8772 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 12.9   n/a MPO502166   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. 2019-August); 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 ] 2020-Oct-22 13:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin