+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1209 Pumma (1927 HA) Classification: Main-belt Asteroid          SPK-ID: 2001209 [ 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 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1284034119629118 3.1504e-08   a 3.168656189543563 1.3567e-08 au q 2.76178992346877 9.7982e-08 au i 6.939133033858012 3.4677e-06 deg node 89.76122393995907 3.2008e-05 deg peri 176.7383044242544 3.5197e-05 deg M 117.7390165572289 1.5078e-05 deg tp 2458326.703099418746 (2018-Jul-27.20309942) 8.5617e-05 TDB period 2060.20817314495 5.64 1.3232e-05 3.623e-08 d yr n .1747396232539223 1.1223e-09 deg/d Q 3.575522455618355 1.5309e-08 au   Orbit Determination Parameters    # obs. used (total)      3040      data-arc span      34177 days (93.57 yr)      first obs. used      1927-04-22      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45499      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:59:09   Additional Information  Earth MOID = 1.74589 au   Jupiter MOID = 1.51221 au   T_jup = 3.179  [ 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 10.7   n/a MPO502164   diameter diameter 26.889 km 0.253 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.5001 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.141   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1209 Pumma (1927 HA)          Discovered 1927-Apr-22 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1927 HA = 1950 JQ = 1963 UU  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 10:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin