+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1509 Esclangona (1938 YG) Classification: Inner Main-belt Asteroid          SPK-ID: 2001509 [ 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 65 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03232705476757542 4.2187e-08   a 1.86625737642138 4.1001e-09 au q 1.805926772003414 7.8447e-08 au i 22.32496707593214 4.5093e-06 deg node 283.5145878038018 1.1245e-05 deg peri 267.5637436394752 8.2926e-05 deg M 251.9340359476929 8.5018e-05 deg tp 2459280.038843565244 (2021-Mar-06.53884357) 0.00022017 TDB period 931.2273717817195 2.55 3.0688e-06 8.402e-09 d yr n .3865865747816359 1.274e-09 deg/d Q 1.926587980839345 4.2327e-09 au   Orbit Determination Parameters    # obs. used (total)      2117      data-arc span      29903 days (81.87 yr)      first obs. used      1938-12-21      last obs. used      2020-11-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .35308      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:01:04   Additional Information  Earth MOID = .844949 au   Jupiter MOID = 3.2336 au   T_jup = 3.896  [ 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 12.6   n/a MPO502168 IRAS observations used: 2 diameter diameter 8.17 km 0.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2 rotation period rot_per 3.25283 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.] [Polishook, D.; Brosch, N.; Prialnik, D.; Kaspi, S. (2009) Meteoritics and Planetary Sci. 44, 1955-1966.] [Pravec, P.; Wolf, M.; Sarounova, L. (2009) http://www.asu.cas.cz/~ppravec/neo.htm] [Warner, B.D.; Pravec, P.; Kusnirak, P.; Hornoch, K.; Harris, A.W.; et al. (2010) Minor Planet Bull. 37, 70-73.] [Polishook, D.; Brosch, N.; Prialnik, D. (2011) Icarus 212, 167-174.] [Marchis, F.; Enriquez, J.E.; Emery, J.P.; Mueller, M.; et al. (2012) Icarus 221, 1130-1161.] [Warner, B.D. (2013) Minor Planet Bull. 40, 137-145.] [Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.2327   0.038 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2 B-V BV 0.894   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=19.76, mean=19.82, max.=19.87) deg. U-B UB 0.472   0.052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=19.76, mean=19.82, max.=19.87) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices 1509 Esclangona (1938 YG)          Discovered 1938-Dec-21 by Patry, A. at Nice Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-18 17:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin