+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   47171 Lempo (1999 TC36) Classification: TransNeptunian Object          SPK-ID: 2047171 [ 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 .226175741525904 7.8156e-06   a 39.46964058864577 0.00047826 au q 30.5425653607479 6.2003e-05 au i 8.423293262255958 9.5407e-06 deg node 97.01991651280515 0.00013258 deg peri 294.4243411837326 0.00050612 deg M 8.547231394048387 0.00027015 deg tp 2457050.115380136006 (2015-Jan-27.61538014) 0.075566 TDB period 90571.83869973225 247.97 1.6462 0.004507 d yr n .003974745408376746 7.2244e-08 deg/d Q 48.39671581654365 0.00058643 au   Orbit Determination Parameters    # obs. used (total)      640      data-arc span      17013 days (46.58 yr)      first obs. used      1974-06-18      last obs. used      2021-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      1      norm. resid. RMS      .41121      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 04:49:48   Additional Information  Earth MOID = 29.5567 au   Jupiter MOID = 25.6125 au   T_jup = 5.440  [ 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 4.98   n/a E2021B10   rotation period rot_per 6.21 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong. Published Reference List: [Ortiz, J.L.; Gutierrez, P.J.; Casanova, V.; Sota, A. (2003) Astron. Astrophys. 407, 1149-1155.] [Ivanova, V.; Borisov, G.; Bel'skaya, I. (2005) Abstr. IAU Symp. 229, p. 54.] 47171 Lempo           Discovered 1999 Oct. 1 by E. P. Rubenstein and L.-G. Strolger at Kitt Peak. Lempo is the ancient Finnish devil who, with the help of his two demon cohorts, Hiisi and Paha, brought down the hero Väinämöinen. Within the trans-Neptunian triple system, the satellite (47171) Lempo I was discovered on 2001 Dec. 8 by C. A. Trujillo and M. E. Brown using the Hubble Space Telescope (HST), and is named Paha. The primary was identified as a binary by S. D. Benecchi et al. through re-analysis of the HST data originally obtained by Trujillo and Brown. Lempo refers to the larger component of the central binary and Hiisi to the the smaller component. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2017-10-05 Last Updated: 2017-10-09 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 05:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin