+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1823 Gliese (1951 RD) Classification: Main-belt Asteroid          SPK-ID: 2001823 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1353395307489146 2.8666e-08   a 2.225612215541906 5.1248e-09 au q 1.924398902661412 6.4622e-08 au i 2.892141661120895 3.2135e-06 deg node 309.9899589794933 6.8468e-05 deg peri 296.9510553450416 6.9982e-05 deg M 334.2323342996274 1.4323e-05 deg tp 2459087.305101269805 (2020-Aug-25.80510127) 4.8212e-05 TDB period 1212.753876137024 3.32 4.1888e-06 1.147e-08 d yr n .2968450623688835 1.0253e-09 deg/d Q 2.526825528422401 5.8184e-09 au   Orbit Determination Parameters    # obs. used (total)      2877      data-arc span      26249 days (71.87 yr)      first obs. used      1948-11-05      last obs. used      2020-09-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4106      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:15:07   Additional Information  Earth MOID = .912803 au   Jupiter MOID = 2.50161 au   T_jup = 3.632  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.6   n/a MPO431515   diameter diameter 8.439 km 0.324 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 4.4864 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2014) http://www.asu.cas.cz/~ppravec/neo.htm] [Warner, B.D. (2015) Minor Planet Bull. 42, 54-60.] [Pravec, P.; Wolf, M.; Sarounova, L. (2020) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.189   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1823 Gliese (1951 RD)          Discovered 1951-Sep-04 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1951 RD = 1944 MC = 1948 VH = 1950 BL = 1950 DR = 1950 EF = 1954 NE = 1970 EU2 = 1971 SE1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 05:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin