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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2220699064404714 1.3113e-05  
a 39.265642887408 0.00080579 au
q 30.54592524507634 0.00011492 au
i 8.424119753932096 1.7084e-05 deg
node 97.01313328453716 0.00028372 deg
peri 294.5149510027334 0.0011567 deg
M 6.171508581787217 0.00059107 deg
tp 2457059.841685610844
(2015-Feb-06.34168561)
0.17283 TDB
period 89870.56986631914
246.05
2.7664
0.007574
d
yr
n .004005760734971343 1.2331e-07 deg/d
Q 47.98536052973966 0.00098474 au
  Orbit Determination Parameters
   # obs. used (total)      368  
   data-arc span      16322 days (44.69 yr)  
   first obs. used      1974-06-18  
   last obs. used      2019-02-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .45531  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:12:59  

Additional Information
 Earth MOID = 29.5606 au 
 Jupiter MOID = 25.6138 au 
 T_jup = 5.432 
[ 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 4.7   n/a MPO432029  
rotation period rot_per 6.21 h n/a LCDB (Rev. 2019-January); 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 2017-10-05Last Updated: 2017-10-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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