+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20691 (1999 VY72) Classification: Mars-crossing Asteroid          SPK-ID: 2020691 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3112038405030995 1.3427e-08   a 2.36419210035556 7.9501e-09 au q 1.628446439037821 3.2651e-08 au i 22.21028868451888 5.3924e-07 deg node 110.9999260744359 1.5632e-06 deg peri 254.0509169143709 3.3535e-06 deg M 312.4657138198816 5.5526e-06 deg tp 2459375.818217086750 (2021-Jun-10.31821709) 2.1095e-05 TDB period 1327.769137251253 3.64 6.6974e-06 1.834e-08 d yr n .2711314715036018 1.3676e-09 deg/d Q 3.099937761673299 1.0424e-08 au   Orbit Determination Parameters    # obs. used (total)      2176      data-arc span      10138 days (27.76 yr)      first obs. used      1992-12-26      last obs. used      2020-09-28      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4178      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:27:14   Additional Information  Earth MOID = .753742 au   Jupiter MOID = 2.66141 au   T_jup = 3.387  [ 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 13.45   n/a E2021B10   rotation period rot_per 2.6990 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2010) http://www.asu.cas.cz/~ppravec/neo.htm] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html] [Stephens, R.D. (2014) Minor Planet Bull. 41, 13-15.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.] 20691 (1999 VY72)          Discovered 1999-Nov-11 by McNaught, R. H. at Siding Spring Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 VY72 = 1992 YT2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-21 15:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin