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2826 Ahti (1939 UJ)
Classification: Outer Main-belt Asteroid          SPK-ID: 2002826
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04900328481724454 4.7324e-08  
a 3.222477317346063 2.0994e-08 au
q 3.064565343547043 1.5165e-07 au
i 15.44842554206104 4.9065e-06 deg
node 33.62383507396239 1.639e-05 deg
peri 148.3534360478098 4.4541e-05 deg
M 106.7569067966624 4.0825e-05 deg
tp 2457973.919735576065
(2017-Aug-08.41973558)
0.00023964 TDB
period 2112.920858809188
5.78
2.0648e-05
5.653e-08
d
yr
n .1703802574995123 1.665e-09 deg/d
Q 3.380389291145082 2.2023e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2317  
   data-arc span      29231 days (80.03 yr)  
   first obs. used      1939-10-18  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44567  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:20:12  

Additional Information
 Earth MOID = 2.0726 au 
 Jupiter MOID = 1.59413 au 
 T_jup = 3.130 
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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 11.0   n/a MPO435724  
diameter diameter 39.975 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 24. h n/a LCDB (Rev. 2019-January); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.023   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2826 Ahti (1939 UJ)          Discovered 1939-Oct-18 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1939 UJ = 1942 FH = 1950 TG3 = 1968 UT2 = 1979 RG = 1980 VK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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