+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2381 Landi (1976 AF) Classification: Main-belt Asteroid          SPK-ID: 2002381 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1670043903040543 4.3472e-08   a 2.612635358321429 9.9641e-09 au q 2.176313783218144 1.1297e-07 au i 13.63147582772182 3.8016e-06 deg node 150.1330279285018 1.9855e-05 deg peri 278.0094999287355 2.2496e-05 deg M 218.7783343108511 1.1862e-05 deg tp 2459605.583702816194 (2022-Jan-26.08370282) 5.1965e-05 TDB period 1542.469648342121 4.22 8.824e-06 2.416e-08 d yr n .2333919506208344 1.3352e-09 deg/d Q 3.048956933424714 1.1628e-08 au   Orbit Determination Parameters    # obs. used (total)      2440      data-arc span      25448 days (69.67 yr)      first obs. used      1951-03-10      last obs. used      2020-11-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40887      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:05:58   Additional Information  Earth MOID = 1.23923 au   Jupiter MOID = 2.33337 au   T_jup = 3.350  [ 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 11.7   n/a MPO337267   diameter diameter 13.054 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 3.989 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Almeida, R.; Angeli, C.A.; Duffard, R.; Lazzaro, D. (2004) Astron. Astrophys. 415, 403-406.] [Klinglesmith III, D.A.; Hanowell, J.; Risley, E.; Turk, J.; et al. (2014) Minor Planet Bull. 41, 139-143.] [Stephens, R.D. (2014) Minor Planet Bull. 41, 171-175.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Owings, L.E. (2018) Minor Planet Bull. 45, 227-231.] geometric albedo albedo 0.286   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   2381 Landi (1976 AF)          Discovered 1976-Jan-03 by Felix Aguilar Observatory at El Leoncito Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1976 AF = 1951 EG1 = 1953 QP = 1968 FF = 1970 SD = 1978 NN3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 16:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin