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2091 Sampo (1941 HO)
Classification: Main-belt Asteroid          SPK-ID: 2002091
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05825044727108393 4.091e-08  
a 3.019533965210969 1.5665e-08 au
q 2.8436447611872 1.2242e-07 au
i 11.38018564258575 4.3675e-06 deg
node 114.5173911593135 2.3167e-05 deg
peri 318.7769944381973 4.7011e-05 deg
M 225.6426161304726 4.2585e-05 deg
tp 2459915.765608462085
(2022-Dec-02.26560846)
0.00022886 TDB
period 1916.497714010278
5.25
1.4914e-05
4.083e-08
d
yr
n .1878426451376761 1.4618e-09 deg/d
Q 3.195423169234737 1.6578e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2682  
   data-arc span      35327 days (96.72 yr)  
   first obs. used      1924-01-28  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:19:47  

Additional Information
 Earth MOID = 1.86953 au 
 Jupiter MOID = 1.97904 au 
 T_jup = 3.214 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456500.5 (2013-Jul-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06222576090187105 4.1039e-08  
q 2.825047256624652 1.2316e-07 au
tp 2456091.950177135382
(2012-Jun-13.45017714)
0.00020436 TDB
node 114.5481178366399 2.32e-05 deg
peri 318.8757796438856 4.4639e-05 deg
i 11.37961816421778 4.3674e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2682  
   data-arc span      35327 days (96.72 yr)  
   first obs. used      1924-01-28  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:19:47  

Additional Information
 Jupiter MOID = 1.97904 au 
 T_jup = 3.214 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.684239337118977E-15 -5.018382233330565E-15 2.576374657137141E-13 2.651017346784027E-15 4.807845836622894E-15 1.370194317187427E-15
q -5.018382233330565E-15 1.516794892065195E-14 -8.082873455946993E-14 -5.034805372370818E-15 1.175714472146046E-13 -3.913207611105572E-15
tp 2.576374657137141E-13 -8.082873455946993E-14 4.176194988439049E-8 4.326213713048306E-12 7.822829848467689E-9 -4.773839552678447E-12
node 2.651017346784027E-15 -5.034805372370818E-15 4.326213713048306E-12 5.382257824978354E-10 -5.259714386687566E-10 2.142961814516147E-12
peri 4.807845836622894E-15 1.175714472146046E-13 7.822829848467689E-9 -5.259714386687566E-10 1.992611761740821E-9 -3.032563117106472E-12
i 1.370194317187427E-15 -3.913207611105572E-15 -4.773839552678447E-12 2.142961814516147E-12 -3.032563117106472E-12 1.907401769309825E-11

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 10.54   n/a E2021B10  
diameter diameter 23.024 km 0.474 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 71.34 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.277   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2091 Sampo           Discovered 1941 Apr. 26 by Y. Vaisala at Turku.
Named for the wonder-object in Kalevala, the Finnish national epic. Sampo was to produce every kind of fortune. When Kalevala and Pohjola (the North) were fighting for its possession, out at sea, it broke into pieces, and only tiny fragments could be found.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5450Last Updated: 2006-03-21

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Alternate Designations
 1941 HO = 1931 MG = 1938 UF1 = 1951 GA1 = 1952 LB = 1956 EP = 1971 BH1 = 1978 NB = A924 BB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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