+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   12711 Tukmit (1991 BB) Classification: Apollo [NEO]          SPK-ID: 2012711 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 252 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2721527804479883 4.572e-08   a 1.186364332386381 1.7295e-09 au q .8634919807031057 5.3866e-08 au i 38.48859304843475 9.7829e-07 deg node 294.9798278308552 4.9108e-06 deg peri 322.8985662217969 1.0783e-05 deg M 303.3490367867468 1.3016e-05 deg tp 2459274.772894031831 (2021-Mar-01.27289403) 1.7142e-05 TDB period 471.9821223658185 1.29 1.0321e-06 2.826e-09 d yr n .7627407542376686 1.6679e-09 deg/d Q 1.509236684069655 2.2002e-09 au   Orbit Determination Parameters    # obs. used (total)      1347      # delay obs. used      0      # Doppler obs. used      3      data-arc span      10923 days (29.91 yr)      first obs. used      1991-01-12      last obs. used      2020-12-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45977      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 23:30:47   Additional Information  Earth MOID = .112792 au   Jupiter MOID = 3.72563 au   T_jup = 5.105  [ 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 15.9   n/a MPO452349   rotation period rot_per 3.4848 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2000) http://www.asu.cas.cz/~ppravec/neo.htm] SMASSII spectral type spec_B Sr   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) 12711 Tukmit           Discovered 1991 Jan. 19 by J. E. Mueller at Palomar. Tukmit is Father Sky in the Luiseno creation story. He was made from nothingness and together with Tomaiyavit bore the First People. The First People became all the people, animals, plants and inanimate objects of the earth, the basis of Luiseno existence. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20081113/MPCPages.arc Last Updated: 2008-11-17 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 00:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin