+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2145 Blaauw (1976 UF) Classification: Outer Main-belt Asteroid          SPK-ID: 2002145 [ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0999553516474217 4.4697e-08   a 3.216874743652712 2.0354e-08 au q 2.895330897445195 1.4045e-07 au i 15.01456138627091 3.8551e-06 deg node 264.2963075759108 1.9082e-05 deg peri 278.5070026596896 2.8839e-05 deg M 125.218491472051 2.342e-05 deg tp 2458267.480344684187 (2018-May-28.98034468) 0.00013524 TDB period 2107.412993172761 5.77 2.0001e-05 5.476e-08 d yr n .1708255577650261 1.6213e-09 deg/d Q 3.538418589860228 2.2388e-08 au   Orbit Determination Parameters    # obs. used (total)      2548      data-arc span      16094 days (44.06 yr)      first obs. used      1976-10-24      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .3621      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:04:34   Additional Information  Earth MOID = 1.94539 au   Jupiter MOID = 1.7251 au   T_jup = 3.129  [ 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 11.0   n/a MPO452191   diameter diameter 40.549 km 0.848 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 12.141 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Moravec, P.; Cochren, J.; Gerhardt, M.; Harris, A.; et al. (2012) Minor Planet Bull. 39, 213-216.] geometric albedo albedo 0.051   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   2145 Blaauw (1976 UF)          Discovered 1976-Oct-24 by West, R. M. at La Silla Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1929-Aug-07 09:07 00:03 Jupiter 1.8915646741373 1.89156384766974 1.89156550062442 5.10158780771138 5.01304492897293 2425830.879570756 3.49004581838476 377.620226180022 22.5952706312527 85.737137601156 3985927.30863022 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 1940-Nov-22 00:25 00:03 Jupiter 1.85859537166931 1.85859485678377 1.85859588655516 4.23552179422564 4.1265214955831 2429955.517128214 3.1672153653058 297.391709203957 23.5784634247039 -86.9011544130664 3138354.00009354 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 1952-Feb-25 13:05 00:03 Jupiter 1.87789414938299 1.87789352200651 1.87789477676065 3.03370001909435 2.88118683059222 2434068.044831047 3.03354091913041 168.233573758844 29.1693992627563 -69.2912002136263 1640351.22237018 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 1963-Apr-23 08:19 00:03 Jupiter 1.90408489554235 1.90408432002248 1.9040854710621 1.77154063484801 1.49955538643689 2438142.846817294 2.87781797541847 143.415225122845 36.6965296962136 -45.3127635483368 2017132.97964052 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 1974-Jun-13 03:32 00:02 Jupiter 1.8956449249373 1.89564434285433 1.895645507025 2.64451424610888 2.46977824351256 2442211.647455315 1.91030700495266 469.045856298507 28.6951367975129 83.2751182205721 2287382.84596196 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 1985-Sep-12 15:54 00:01 Jupiter 1.88508764371041 1.88508712415325 1.88508816326778 3.86066368001794 3.74246819679346 2446321.162824929 1.11408338340284 131.903129355059 25.7216984493913 85.4726262081036 2307181.56507403 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 1997-Jan-03 20:58 < 00:01 Jupiter 1.91071801652612 1.91071755838294 1.91071847466942 4.70287177407759 4.6076459984865 2450452.373646960 0.632224825053664 89.4097680904413 21.2213968123482 85.2211477395944 3486719.78040384 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2008-Apr-28 20:14 < 00:01 Jupiter 1.99367667224944 1.99367629322715 1.99367705127174 5.32723413145648 5.24687664056095 2454585.342881884 0.307786367759734 59.364545953467 17.6230122222225 84.8341691099308 4768083.21228579 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2131-Nov-21 03:48 00:03 Jupiter 1.95075079570509 1.95074943923977 1.95075215217949 5.53890282430052 5.45994851735039 2499715.658440949 2.50107554466996 238.382726529974 24.5504890757751 75.0670984857198 4262540.21451734 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2143-Mar-14 00:14 00:03 Jupiter 1.8234355809259 1.8234348313186 1.82343633054657 5.05037638796472 4.95754590690544 2503846.509783631 2.70315071402755 311.874831974728 20.9880098040287 85.0945074890343 3915508.48543557 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2154-Jul-13 17:10 00:03 Jupiter 1.78343857845926 1.78343805077784 1.78343910614504 4.41288550981102 4.30391482107816 2507986.214965593 3.09481698000298 336.708580052121 21.9649934123012 -86.6917820244745 3336194.64173064 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2165-Nov-05 08:41 00:04 Jupiter 1.81712753547275 1.81712644540479 1.81712862555331 3.51239071510748 3.37707316903319 2512118.861889806 3.92903818365805 286.547909266192 25.9126154273583 -74.2835856977699 2343109.19247792 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2177-Jan-27 07:51 00:06 Jupiter 1.88421699584352 1.88421574119261 1.88421825049851 2.23465229689381 2.02351174847712 2516219.826739517 5.532756471096 261.378985384405 53.1645238281657 -9.57300111882466 428503.574491937 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2188-Mar-10 20:47 00:06 Jupiter 1.92936871806006 1.9293680182399 1.92936941803321 2.09292394611623 1.87144326931279 2520280.366107915 6.41724401551365 1434.08845896843 32.9606806481046 80.1283901989476 2147297.60780142 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 2199-May-18 07:56 00:06 Jupiter 1.94843092642618 1.94843040490484 1.9484314479474 3.50690689772317 3.38067380108224 2524365.830850373 5.95041835298724 250.671085122583 29.2185489876585 80.7472454853895 737037.062129779 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:39 2020-Dec-18 02:04 Alternate Designations  1976 UF = 1929 XS = 1963 RK = 1980 TW  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 08:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin