+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1870 Glaukos (1971 FE) Classification: Jupiter Trojan          SPK-ID: 2001870 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03374223353751021 2.0598e-08   a 5.243562931651447 6.5267e-08 au q 5.066633406643033 1.4983e-07 au i 6.577644029281521 5.1359e-07 deg node 176.3067914576586 1.4636e-05 deg peri 130.4419085214413 4.7331e-05 deg M 313.6961138599248 4.4896e-05 deg tp 2459960.596096676630 (2023-Jan-16.09609668) 0.00054958 TDB period 4385.69225462545 12.01 8.1883e-05 2.242e-07 d yr n .0820851028980247 1.5326e-09 deg/d Q 5.420492456659862 6.7469e-08 au   Orbit Determination Parameters    # obs. used (total)      2422      data-arc span      23956 days (65.59 yr)      first obs. used      1955-11-24      last obs. used      2021-06-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .472      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 12:53:33   Additional Information  Earth MOID = 4.05608 au   Jupiter MOID = .132367 au   T_jup = 2.986  [ 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 10.75   n/a MPO614063   diameter diameter 47.649 km 0.774 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   rotation period rot_per 5.986 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Stephens, R.D.; French, L.M.; Davitt, C.; Coley, D.R. (2014) Minor Planet Bull. 41, 95-100.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] geometric albedo albedo 0.049   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   1870 Glaukos (1971 FE)          Discovered 1971-Mar-24 by Van Houten, C. J. at Palomar Discovered by C. J. van Houten and I. van Houten-Groeneveld, Leiden, on plates exposed by T. Gehrels in a survey of faint Trojans with the 122 cm Schmidt camera at Palomar. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1971 FE = 1976 SM  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-29 10:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin