+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   12753 Povenmire (1993 HE) Classification: Main-belt Asteroid          SPK-ID: 2012753 [ 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 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1455168123056703 1.8223e-08   a 2.624322560079835 1.1549e-08 au q 2.242439506675161 4.8532e-08 au i 14.81935058559044 1.2159e-06 deg node 93.64000637295312 2.8381e-06 deg peri 111.3575736024961 1.0792e-05 deg M 183.3051475061983 1.0128e-05 deg tp 2459962.659109296280 (2023-Jan-18.15910930) 4.6812e-05 TDB period 1552.83119725452 4.25 1.0251e-05 2.807e-08 d yr n .2318346003329256 1.5304e-09 deg/d Q 3.006205613484508 1.323e-08 au   Orbit Determination Parameters    # obs. used (total)      2207      data-arc span      26011 days (71.21 yr)      first obs. used      1949-11-25      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41352      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 23:32:59   Additional Information  Earth MOID = 1.28183 au   Jupiter MOID = 2.11744 au   T_jup = 3.341  [ hide covariance matrix ] Orbital Elements at Epoch 2457254.5 (2015-Aug-20.0) TDB Reference: JPL 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1444501754876047 1.8236e-08   q 2.246673810066028 4.8542e-08 au tp 2456856.202708274725 (2014-Jul-17.70270827) 3.7117e-05 TDB node 93.66918912922029 2.84e-06 deg peri 111.5704424760196 1.083e-05 deg i 14.81331495119899 1.2148e-06 deg   Orbit Determination Parameters    # obs. used (total)      2207      data-arc span      26011 days (71.21 yr)      first obs. used      1949-11-25      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41352      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 23:32:59   Additional Information  Jupiter MOID = 2.11744 au   T_jup = 3.341  Orbit Covariance (6×6)   e q tp node peri i e 3.32557941238801E-16 -8.665443237066943E-16 -8.759260320214696E-14 -1.090318115213403E-14 -4.245280335797793E-14 -4.342471690393183E-15 q -8.665443237066943E-16 2.356371813397223E-15 3.275528086223177E-13 2.599549983942257E-14 1.407721678900988E-13 9.952214145264833E-15 tp -8.759260320214696E-14 3.275528086223177E-13 1.377669226281549E-9 -6.803495960977349E-11 3.943982560189346E-10 -3.567728840542643E-11 node -1.090318115213403E-14 2.599549983942257E-14 -6.803495960977349E-11 8.065861453205155E-12 -2.211011258015697E-11 2.627889575255211E-12 peri -4.245280335797793E-14 1.407721678900988E-13 3.943982560189346E-10 -2.211011258015697E-11 1.172916763157794E-10 -1.037345896041051E-11 i -4.342471690393183E-15 9.952214145264833E-15 -3.567728840542643E-11 2.627889575255211E-12 -1.037345896041051E-11 1.475755121158763E-12 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.81   n/a E2021B10   diameter diameter 7.612 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 17.5752 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Gary, B.L. (2015) Minor Planet Bull. 42, 160-161.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] geometric albedo albedo 0.305   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   12753 Povenmire           Discovered 1993 Apr. 18 by C. S. Shoemaker and E. M. Shoemaker at Palomar. Katie Povenmire, a coronary critical care nurse, is a skilled observer of the skies with her husband Hal Povenmire. Meteor showers, lunar grazes and occultations for determining the diameters of minor planets come under her discerning eye. Katie understands well the joy and success of team work. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20000726/MPCPages.arc Last Updated: 2013-03-29 Alternate Designations  1993 HE = 1984 AH1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-15 18:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin