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Asteroids with Satellites Database--Johnston's Archive

(47171) Lempo, Paha, and Hiisi

compiled by Wm. Robert Johnston
last updated8 October 2017

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa:	39.4715 AU
orbital periodP:	247.990 yr (= 90578.3 d)
eccentricitye:	0.225902
perihelion distanceq:	30.55480 AU
aphelion distanceQ:	48.3882 AU
inclinationi:	8.410430°
argument of perihelionω:	295.4575°
ascending nodeΩ:	97.18500°
mean anomalyM:	358.2871°
perihelion passageT_P:	2015 Jul 27
Epoch:	2014 May 23
data arc:	1974-2013(105 obs.)
Earth MOID:	29.5689 AU
Jupiter Tisserand invariantT_J:	5.44
Neptune Tisserand invariantT_N:	2.97 [*D]

orbital data, second component:

semimajor axisa_s:	7411± 12 km[B10a]
separation/primary radiusa_s/r_p:	54 [*D]
separation/Hill radiusa_s/r_H:	0.013 [*D]
orbital periodP_s:	50.3± 0.001d [B10a]
eccentricitye_s:	?
normalized ang. mom.α_L:	?

orbital data, third component:

semimajor axisa_s:	867± 11 km[B10a]
separation/primary radiusa_s/r_p:	6.4 [*D]
separation/Hill radiusa_s/r_H:	0.0015 [*D]
orbital periodP_s:	1.907± 0.0001d [B10a]
eccentricitye_s:	?
normalized ang. mom.α_L:	?

other data, system (combined):

absolute mag.H:	5[MPC] 5.41 ± 0.1 [M12a]
slope parameterG:	(0.15) [*A]
effective diameterd_E:	393.1± 25.2/26.8 km [M12a]
geometric albedo:	0.079± 0.013/0.011[M12a]
color indexU-B:	?
color indexB-V:	1.01[B05b]
color indexV-R:	0.69 ± 0.03 [B05b]
color indexB-R:	1.7 [B05b]
color indexV-I:	1.32 [B05b]
color indexR-J:	1.63 [*D]
color indexV-J:	2.32 ± 0.07 [M03c]
color indexJ-H:	0.42 [*D]
color indexV-H:	2.74 ± 0.03 [B05b]
taxonomic type:	RR (G-mode) [B05b]
massm:	1.28x10¹⁹ ± 6x10¹⁶kg [B10a]
densityρ:	0.64± 0.15/0.11 g/cm³[M12a]
Hill radiusr_H:	590000 km [*D]

other data, primary:

diameterd_p:	272± 17/19 km [M12a]
color indexV-I:	1.19 ± 0.01 [B08d]
rotation periodRP_p:	45.763± 0.002h [B10a]
amplitude in mag., rotationalΔM:	0.06 [T14a]
pole directionΒ, λ:	?,?

other data, second component:

diameterd_s:	132± 8/9km [M12a]
diameter ratiod_s/d_p:	0.486± 0.1 [*D]
component mag. differenceΔM:	2.14 [M05b]
color indexV-I:	1.12± 0.03 [B08d]
rotation periodRP_s:	?

other data, third component:

diameterd_s:	251± 16/17km [M12a]
diameter ratiod_s/d_p:	0.927± 0.19 [*D]
component mag. differenceΔM:	0.2 [* D]
rotation periodRP_s:	?

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

Primary discovered1999 Oct 01from Kitt Peak Observatory, Arizona, USAby 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 discovered2001 Dec 08 by C. A. Trujillo and M. E. BrownusingHubble Space Telescope observations from Hubble Space Telescope.Announced2002 Jan 10 [T02b]. Named 5 October 2017 for the mythological Finnish demon.

Third component discovered2007 Oct usingHubble Space Telescope observations from Hubble Space Telescope.Announced2007 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 AbstractsOrbital Evolution and Determination of Trans-Neptunian Binaries and Multiples
Fang, Julia & Margot, J. 2012, AAS/Division of Dynamical Astronomy MeetingDynamical 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 AstrophysicsTNOs 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 SocietyFormation of Kuiper Belt Binaries by Gravitational Collapse
Nesvorný, David, Youdin, Andrew N., & Richardson, Derek C. 2010, The Astronomical JournalFormation 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 AstrophysicsESO 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, IcarusThe 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 SocietyColors 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 SocietyA 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 JournalThe 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 AstrophysicsSearch 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 SocietyAlbedos, 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 SocietyKuiper Belt Binaries: Masses, Colors, and a Density
Spencer, John, Grundy, William, Noll, Keith, & Stansberry, John 2005, Spitzer ProposalDensity and Albedo of the KBO Binary System 1999 SM165
Barucci, M. A., Merlin, F., & Dotto, E. 2004, Bulletin of the American Astronomical SocietyHeterogeneity/homogeneity on the TNO and Centaur surfaces
Margot, J. L., Brown, M. E., Trujillo, C. A., & Sari, R. 2004, Bulletin of the American Astronomical SocietyHST observations of Kuiper Belt binaries
Altenhoff, W. J., Bertoldi, F., & Menten, K. M. 2004, Astronomy and AstrophysicsSize estimates of some optically bright KBOs
Ortiz, J. L., Gutiérrez, P. J., Casanova, V., & Sota, A. 2003, Astronomy and AstrophysicsA study of short term rotational variability in TNOs and Centaurs from Sierra Nevada Observatory
Takato, Naruhisa 2003, Subaru ProposalNear-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 PlanetsResults 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 SocietyNear 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, IcarusSearching 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 AstronomyVisible-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 AstrophysicsBVRI Photometry of 27 Kuiper Belt Objects with ESO/Very Large Telescope
Brown, M. E. 2000, Bulletin of the American Astronomical SocietyNear-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, 2017by Wm. Robert Johnston.
Last modified8 October 2017.
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