+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   12512 Split (1998 HW7) Classification: Main-belt Asteroid          SPK-ID: 2012512 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .191336495303033 3.3405e-08   a 2.269566201646803 5.3167e-09 au q 1.835315358765488 7.5651e-08 au i 5.068956437818873 3.3104e-06 deg node 224.3892162154032 4.1684e-05 deg peri 84.49645374795834 4.2693e-05 deg M 94.97790648184377 8.4934e-06 deg tp 2458671.017159318401 (2019-Jul-06.51715932) 2.9543e-05 TDB period 1248.856992526468 3.42 4.3883e-06 1.201e-08 d yr n .2882635899501281 1.0129e-09 deg/d Q 2.703817044528119 6.3339e-09 au   Orbit Determination Parameters    # obs. used (total)      1692      data-arc span      12817 days (35.09 yr)      first obs. used      1985-09-19      last obs. used      2020-10-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49642      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:52:27   Additional Information  Earth MOID = .82935 au   Jupiter MOID = 2.56475 au   T_jup = 3.584  [ 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 14.7   n/a MPO502264   diameter diameter 4.626 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 5.7781 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.119   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   12512 Split           Discovered 1998 Apr. 21 by K. Korlevic and M. Dusić at the Visnjan Observatory. Split is the largest Dalmatian city and the second-largest urban center in Croatia. Located on the shores of the eastern Adriatic Sea, it is a vital link to the numerous surrounding islands. The historic city of Split is built around the "Palace of Diocletian", the world's best preserved Roman palace. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20090607/MPCPages.arc Last Updated: 2009-06-08 [ show close-approach data ] Alternate Designations  1998 HW7 = 1985 SE3 = 1985 SQ5 = 1995 MF2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-26 22:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin