(47171) Lempo, Paha, and Hiisi

Asteroids with Satellites Database--Johnston's Archive

(47171) Lempo, Paha, and Hiisi

compiled by Wm. Robert Johnston
last updated 8 October 2017

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary: TNO, plutino
orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 39.4715 AU
orbital period P: 247.990 yr
(= 90578.3 d)
eccentricity e: 0.225902
perihelion distance q: 30.55480 AU
aphelion distance Q: 48.3882 AU
inclination i: 8.410430°
argument of perihelion ω: 295.4575°
ascending node Ω: 97.18500°
mean anomaly M: 358.2871°
perihelion passage T_P: 2015 Jul 27
Epoch: 2014 May 23
data arc: 1974-2013 (105 obs.)
Earth MOID: 29.5689 AU
Jupiter Tisserand invariant T_J: 5.44

Neptune Tisserand invariant T_N: 2.97 [*D]

orbital data, second component:

semimajor axis a_s: 7411 ± 12 km [B10a]
separation/primary radius a_s/r_p: 54 [*D]
separation/Hill radius a_s/r_H: 0.013 [*D]
orbital period P_s: 50.3 ± 0.001 d [B10a]
eccentricity e_s: ?
normalized ang. mom. α_L: ?

orbital data, third component:

semimajor axis a_s: 867 ± 11 km [B10a]
separation/primary radius a_s/r_p: 6.4 [*D]
separation/Hill radius a_s/r_H: 0.0015 [*D]
orbital period P_s: 1.907 ± 0.0001 d [B10a]
eccentricity e_s: ?
normalized ang. mom. α_L: ?

other data, system (combined):

absolute mag. H: 5 [MPC]
5.41 ± 0.1 [M12a]
slope parameter G: (0.15) [*A]
effective diameter d_E: 393.1 ± 25.2/26.8 km [M12a]
geometric albedo: 0.079 ± 0.013/0.011 [M12a]
color index U-B: ?
color index B-V: 1.01 [B05b]
color index V-R: 0.69 ± 0.03 [B05b]
color index B-R: 1.7 [B05b]
color index V-I: 1.32 [B05b]
color index R-J: 1.63 [*D]
color index V-J: 2.32 ± 0.07 [M03c]
color index J-H: 0.42 [*D]
color index V-H: 2.74 ± 0.03 [B05b]
taxonomic type: RR (G-mode) [B05b]
mass m: 1.28x10¹⁹ ± 6x10¹⁶ kg [B10a]
density ρ: 0.64 ± 0.15/0.11 g/cm³[M12a]
Hill radius r_H: 590000 km [*D]
other data, primary:

diameter d_p: 272 ± 17/19 km [M12a]
color index V-I: 1.19 ± 0.01 [B08d]
rotation period RP_p: 45.763 ± 0.002 h [B10a]
amplitude in mag., rotational ΔM: 0.06 [T14a]
pole direction Β, λ: ? , ?

other data, second component:

diameter d_s: 132 ± 8/9 km [M12a]
diameter ratio d_s/d_p: 0.486 ± 0.1 [*D]
component mag. difference ΔM: 2.14 [M05b]
color index V-I: 1.12± 0.03 [B08d]
rotation period RP_s: ?

other data, third component:

diameter d_s: 251 ± 16/17 km [M12a]
diameter ratio d_s/d_p: 0.927 ± 0.19 [*D]
component mag. difference ΔM: 0.2 [* D]
rotation period RP_s: ?

-- (47171) Lempo --discovery and notes:

Primary discovered 1999 Oct 01 from Kitt Peak Observatory, Arizona, USA by E. P. Rubenstein and L.-G. Strolger. Linked to prediscovery observations from 1974 Jun 18. Permanent number assigned 2002 Sep 21. Named 5 October 2017 for the mythological Finnish devil.

Second component discovered 2001 Dec 08 by C. A. Trujillo and M. E. Brown using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2002 Jan 10 [T02b]. Named 5 October 2017 for the mythological Finnish demon.

Third component discovered 2007 Oct using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2007 Oct . Named 5 October 2017 for the mythological Finnish demon.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

Porter, Simon & Grundy, W. 2012, AAS/Division for Planetary Sciences Meeting Abstracts Orbital Evolution and Determination of Trans-Neptunian Binaries and Multiples
Fang, Julia & Margot, J. 2012, AAS/Division of Dynamical Astronomy Meeting Dynamical Architecture of Multi-Component Systems
Mommert, M., Harris, A. W., Kiss, C., Pál, A., Santos-Sanz, P., Stansberry, J., Delsanti, A., Vilenius, E., Müller, T. G., Peixinho, N., Lellouch, E., Szalai, N., Henry, F., Duffard, R., Fornasier, S., Hartogh, P., Mueller, M., Ortiz, J. L., Protopapa, S., Rengel, M., & Thirouin, A. 2012, Astronomy and Astrophysics TNOs are cool: A survey of the trans-Neptunian region. V. Physical characterization of 18 Plutinos using Herschel-PACS observations
Nesvorny, David, Youdin, A. N., & Richardson, D. C. 2010, Bulletin of the American Astronomical Society Formation of Kuiper Belt Binaries by Gravitational Collapse
Nesvorný, David, Youdin, Andrew N., & Richardson, Derek C. 2010, The Astronomical Journal Formation of Kuiper Belt Binaries by Gravitational Collapse
Benecchi, S. D., Noll, K. S., Grundy, W. M., & Levison, H. F. 2010, Icarus (47171) 1999 TC 36, A transneptunian triple
Benecchi, Susan D., Noll, K. S., Grundy, W. M., & Levison, H. F. 2009, AAS/Division for Planetary Sciences Meeting Abstracts #41 (47171) 1999 TC36, A Transneptunian Triple
Protopapa, S., Alvarez-Candal, A., Barucci, M. A., Tozzi, G. P., Fornasier, S., Delsanti, A., & Merlin, F. 2009, Astronomy and Astrophysics ESO large program about transneptunian objects: surface variations on (47171) 1999 TC{36}
Grundy, W. M., Stansberry, J. A., Noll, K. S., Stephens, D. C., Trilling, D. E., Kern, S. D., Spencer, J. R., Cruikshank, D. P., & Levison, H. F. 2007, Icarus The orbit, mass, size, albedo, and density of (65489) Ceto/Phorcys: A tidally-evolved binary Centaur
Jacobson, Seth & Margot, J. L. 2007, Bulletin of the American Astronomical Society Colors of TNO Binaries and Evidence for a Triple System from HST Observations
Spencer, John R., Stansberry, J. A., Grundy, W. M., & Noll, K. S. 2006, Bulletin of the American Astronomical Society A Low Density for Binary Kuiper Belt Object (26308) 1998 SM165
Stansberry, J. A., Grundy, W. M., Margot, J. L., Cruikshank, D. P., Emery, J. P., Rieke, G. H., & Trilling, D. E. 2006, The Astrophysical Journal The Albedo, Size, and Density of Binary Kuiper Belt Object (47171) 1999 TC36
Merlin, F., Barucci, M. A., Dotto, E., de Bergh, C., & Lo Curto, G. 2005, Astronomy and Astrophysics Search for surface variations on TNO 47171 and Centaur 32532
Stansberry, J. A., Cruikshank, D. P., Grundy, W. G., Margot, J. L., Emery, J. P., Fernandez, Y. R., & Rieke, G. H. 2005, Bulletin of the American Astronomical Society Albedos, Diameters (and a Density) of Kuiper Belt and Centaur Objects
Margot, J. L., Brown, M. E., Trujillo, C. A., Sari, R., & Stansberry, J. A. 2005, Bulletin of the American Astronomical Society Kuiper Belt Binaries: Masses, Colors, and a Density
Spencer, John, Grundy, William, Noll, Keith, & Stansberry, John 2005, Spitzer Proposal Density and Albedo of the KBO Binary System 1999 SM165
Barucci, M. A., Merlin, F., & Dotto, E. 2004, Bulletin of the American Astronomical Society Heterogeneity/homogeneity on the TNO and Centaur surfaces
Margot, J. L., Brown, M. E., Trujillo, C. A., & Sari, R. 2004, Bulletin of the American Astronomical Society HST observations of Kuiper Belt binaries
Altenhoff, W. J., Bertoldi, F., & Menten, K. M. 2004, Astronomy and Astrophysics Size estimates of some optically bright KBOs
Ortiz, J. L., Gutiérrez, P. J., Casanova, V., & Sota, A. 2003, Astronomy and Astrophysics A study of short term rotational variability in TNOs and Centaurs from Sierra Nevada Observatory
Takato, Naruhisa 2003, Subaru Proposal Near-Infrared Spectroscopy of Binary Trans-Neptune Objects 1999 TC36
Boehnhardt, Hermann, Barucci, Antonella, Delsanti, Audrey, De Bergh, Catherine, Doressoundiram, Alain, Romon, Jennifer, Dotto, Elisabetta, Tozzi, Gianpaolo, Lazzarin, Monica, Fornasier, Sonia, Peixinho, Nuno, Hainaut, Olivier, Davies, John, Rousselot, Philippe, Barrera, Luis, Birkle, Kurt, Meech, Karen, Ortiz, JoseLuis, Sekiguchi, Tomohiko, Watanabe, Jun-ichi, Thomas, Nick, & West, Richard 2003, Earth Moon and Planets Results from the Eso Large Program on Transneptunian Objects and Centaurs
Licandro, J., Campins, H., de Leon Cruz, J., Gil-Hutton, R., & Lara-Lopez, L. M. 2003, Bulletin of the American Astronomical Society Near infrared spectroscopy of TNOs, Centaurs and comet nuclei.
Dotto, E., Barucci, M. A., Boehnhardt, H., Romon, J., Doressoundiram, A., Peixinho, N., de Bergh, C., & Lazzarin, M. 2003, Icarus Searching for water ice on 47171 1999 TC36, 1998 SG35, and 2000 QC243: ESO large program on TNOs and centaurs*
Peixinho, N., Doressoundiram, A., & Romon-Martin, J. 2002, New Astronomy Visible-IR colors and lightcurve analysis of two bright TNOs: 1999 TC 36 and 1998 SN 165
Delsanti, A. C., Boehnhardt, H., Barrera, L., Meech, K. J., Sekiguchi, T., & Hainaut, O. R. 2001, Astronomy and Astrophysics BVRI Photometry of 27 Kuiper Belt Objects with ESO/Very Large Telescope
Brown, M. E. 2000, Bulletin of the American Astronomical Society Near-infrared spectroscopy of Kuiper belt objects
Griffin, I. P., Brady, N., Greatrex, R., Bredenkamp, T., & Marsden, B. G. 2000, Minor Planet Electronic Circ., 2000-O37 (2000). 1999 TC36
Luu, J. X., Jewitt, D. C., Trujillo, C. A., Tholen, D., Sheppard, S., Rubenstein, E. P., Smith, C. R., Strolger, L.-G., Hergenrother, C. W., & Marsden, B. G. 1999, Minor Planet Electronic Circ., 1999-Y19 (1999). 1999 RV214

© 2002-2014, 2017 by Wm. Robert Johnston.
Last modified 8 October 2017.
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