+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15689 (1981 UP25) Classification: Main-belt Asteroid          SPK-ID: 2015689 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .195799019027625 4.7356e-08   a 2.542807386226233 1.2996e-08 au q 2.044928194426938 1.2092e-07 au i 7.733066277851072 4.3097e-06 deg node 201.2153269903966 3.1971e-05 deg peri 1.251715192943509 3.4595e-05 deg M 78.96009966120499 1.2402e-05 deg tp 2458875.656777334299 (2020-Jan-27.15677733) 5.1966e-05 TDB period 1481.046258318107 4.05 1.1354e-05 3.109e-08 d yr n .2430714084574374 1.8635e-09 deg/d Q 3.040686578025529 1.5541e-08 au   Orbit Determination Parameters    # obs. used (total)      2176      data-arc span      14251 days (39.02 yr)      first obs. used      1981-09-24      last obs. used      2020-09-30      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41921      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:05:50   Additional Information  Earth MOID = 1.04103 au   Jupiter MOID = 1.91743 au   T_jup = 3.405  [ 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 13.26   n/a E2021B10   15689 (1981 UP25)          Discovered 1981-Oct-25 by Bus, S. J. at Palomar Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1981 UP25 = 1981 ST8 = 1999 BM23  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 08:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin