+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3438 Inarradas (1974 SD5) Classification: Main-belt Asteroid          SPK-ID: 2003438 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2025205515109857 4.7448e-08   a 3.045598456349975 1.5958e-08 au q 2.428802177288972 1.428e-07 au i 15.30048865604688 5.0204e-06 deg node 2.417085621405061 1.3767e-05 deg peri 349.8149785537737 1.6609e-05 deg M 206.6597362786914 1.1696e-05 deg tp 2459827.415433156334 (2022-Sep-04.91543316) 6.7143e-05 TDB period 1941.365879462175 5.32 1.5259e-05 4.178e-08 d yr n .1854364516284444 1.4575e-09 deg/d Q 3.662394735410978 1.919e-08 au   Orbit Determination Parameters    # obs. used (total)      2306      data-arc span      28407 days (77.77 yr)      first obs. used      1942-09-07      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42758      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:57:33   Additional Information  Earth MOID = 1.42563 au   Jupiter MOID = 1.7864 au   T_jup = 3.154  [ 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 11.8   n/a MPO384783   diameter diameter 25.252 km 0.210 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 24.82 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: [Folberth, J.; Casimir, S.; Dou, Y.; Evans, D; et al. (2012) Minor Planet Bull. 39, 51-55.] geometric albedo albedo 0.045   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   3438 Inarradas (1974 SD5)          Discovered 1974-Sep-21 by Felix Aguilar Observatory at El Leoncito Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1974 SD5 = 1942 RD = 1969 TC4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-06 10:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin