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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2261755191796947 7.7647e-06  
a 39.46962706409563 0.00047533 au
q 30.54256367104487 6.1736e-05 au
i 8.423294415766172 9.4515e-06 deg
node 97.01989494797074 0.00013036 deg
peri 294.424367484739 0.00050429 deg
M 8.547232719175554 0.00026807 deg
tp 2457050.116152016042
0.075421 TDB
period 90571.79214711922
n .003974747451339355 7.1802e-08 deg/d
Q 48.39669045714638 0.00058284 au
  Orbit Determination Parameters
   # obs. used (total)      649  
   data-arc span      17030 days (46.63 yr)  
   first obs. used      1974-06-18  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .41018  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:57:08  

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 2017-10-05Last Updated: 2017-10-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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