+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1499 Pori (1938 UF) Classification: Main-belt Asteroid          SPK-ID: 2001499 [ 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 .1869745753809303 2.3833e-08   a 2.669596483170285 7.606e-09 au q 2.170449814291096 6.6594e-08 au i 12.17682051630668 4.4716e-07 deg node 239.5747743220531 2.6483e-06 deg peri 74.64600607362883 4.283e-06 deg M 36.37366822294845 2.5855e-06 deg tp 2459235.527585044853 (2021-Jan-21.02758504) 1.1065e-05 TDB period 1593.187385683908 4.36 6.8088e-06 1.864e-08 d yr n .2259621204855716 9.6569e-10 deg/d Q 3.168743152049473 9.0281e-09 au   Orbit Determination Parameters    # obs. used (total)      2743      data-arc span      28820 days (78.90 yr)      first obs. used      1942-08-11      last obs. used      2021-07-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4048      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 09:25:34   Additional Information  Earth MOID = 1.1936 au   Jupiter MOID = 2.19202 au   T_jup = 3.325  [ 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 11.44   n/a E2021B10   diameter diameter 14.896 km 0.348 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 3.3557 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Stephens, R.D. (2004) Minor Planet Bull. 31, 4-6.] [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Benishek, V. (2018) Minor Planet Bull. 45, 187-189.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.240   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1499 Pori (1938 UF)          Discovered 1938-Oct-16 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1938 UF = 1951 RU1 = 1959 NA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-26 14:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin