+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1534 Nasi (1939 BK) Classification: Main-belt Asteroid          SPK-ID: 2001534 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2519300733941967 2.7811e-08   a 2.728894633211328 7.0716e-09 au q 2.041404007981368 7.5261e-08 au i 9.793156602306903 3.5852e-06 deg node 62.13108716868496 2.1012e-05 deg peri 42.68349380836393 2.2694e-05 deg M 32.87063190506867 7.1273e-06 deg tp 2458850.156682242187 (2020-Jan-01.65668224) 3.2582e-05 TDB period 1646.563855210424 4.51 6.4003e-06 1.752e-08 d yr n .2186371326327903 8.4986e-10 deg/d Q 3.416385258441287 8.8532e-09 au   Orbit Determination Parameters    # obs. used (total)      2821      data-arc span      34900 days (95.55 yr)      first obs. used      1924-12-22      last obs. used      2020-07-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39442      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:18:01   Additional Information  Earth MOID = 1.06998 au   Jupiter MOID = 1.82486 au   T_jup = 3.288  [ 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 11.9   n/a MPO452181   diameter diameter 22.12 km 0.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 rotation period rot_per 7.94 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Sauppe, J.; Torno, S.; Lemke-Oliver, R.; Ditteon, R. (2007) Minor Planet Bull. 34, 119-122.] [Galad, A. (2010) Astron. Astrophys. 514, A55.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] geometric albedo albedo 0.0754   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 SMASSII spectral type spec_B Cgh   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 1534 Nasi (1939 BK)          Discovered 1939-Jan-20 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1939 BK = 1933 UQ = 1957 EA = 1960 UB = 1962 JA = A915 VB = A924 WE = A924 YE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-19 09:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin