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1498 Lahti (1938 SK1)
Classification: Main-belt Asteroid          SPK-ID: 2001498
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2353761297909791 9.7863e-09  
a 3.102629810824725 1.0039e-08 au
q 2.372344813778684 2.8705e-08 au
i 12.66311392631782 6.0571e-07 deg
node 265.1052744140984 2.1271e-06 deg
peri 96.62077065703087 6.3218e-06 deg
M 24.12404276501487 4.2355e-06 deg
tp 2459066.735473288989
(2020-Aug-05.23547329)
2.3284e-05 TDB
period 1996.150897468965
5.47
9.6878e-06
2.652e-08
d
yr
n .1803470872149319 8.7527e-10 deg/d
Q 3.832914807870766 1.2401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2583  
   data-arc span      26068 days (71.37 yr)  
   first obs. used      1949-10-26  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42636  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:32:20  

Additional Information
 Earth MOID = 1.4095 au 
 Jupiter MOID = 1.9645 au 
 T_jup = 3.142 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.90   n/a E2021B10  
diameter diameter 31.605 km 0.579 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 58. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Ruthroff, J.C. (2011) Minor Planet Bull. 38, 86-88.]
geometric albedo albedo 0.034   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1498 Lahti (1938 SK1)          Discovered 1938-Sep-16 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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