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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
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 
[ 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 11.0   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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1904-Nov-27 20:45 00:04 Jupiter 1.75393481751667 1.75393398067932 1.75393565437635 4.94724946988171 4.84865169670676 2416812.364345991 3.50029122802874 354.957123754589 16.2381375053244 -84.0630512043378 3166894.00750653 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
1916-Apr-30 07:33 00:03 Jupiter 1.73949030010036 1.73948983539168 1.73949076481143 4.76476467654584 4.66144913586487 2420983.814279164 3.00234679955572 257.170456060119 21.3113692573836 -87.6001664840676 3054334.53705504 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
1927-Sep-28 22:09 00:03 Jupiter 1.79008026051262 1.79007935909733 1.79008116195904 4.46005646581811 4.35267185055798 2425152.422768906 2.67239338440175 498.003218912319 28.7366702115138 -85.4903799435195 3604872.30830604 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
1939-Feb-15 03:48 00:02 Jupiter 1.88927279012833 1.88927169872297 1.88927388155592 4.0141656087656 3.90087943991871 2429309.658271716 2.45795853368989 412.289097516753 31.946977408129 -82.8095395793342 3209260.74829117 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
2131-Apr-28 10:57 00:03 Jupiter 1.97131052721467 1.97130860092787 1.97131245351582 4.68085090200842 4.58813856663897 2499508.956522143 3.03948177742308 289.622094625265 17.7883739574321 -70.6149212884238 3840173.72746698 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
2142-Sep-06 10:08 00:03 Jupiter 1.82390493992189 1.82390337938778 1.82390650048307 4.82768628502146 4.73051304853592 2503657.922460060 3.07259999015619 376.632650389308 19.3025157579575 -78.3579305185871 3526114.01109744 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
2154-Feb-02 08:34 00:03 Jupiter 1.73313230555929 1.73313144414091 1.7331331670025 4.85699806407664 4.75531104770581 2507824.856619789 3.21396516555342 376.453381294706 17.5319005339434 -84.1185421857651 3353456.50542028 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
2165-Jul-10 05:41 00:04 Jupiter 1.71144785222652 1.7114473360765 1.71144836837771 4.78543376907396 4.6808700939725 2512000.736806926 3.56654208583184 279.897958430439 24.7959944727585 -88.4206797986804 3632361.37728798 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
2176-Dec-14 18:41 00:04 Jupiter 1.75431009228797 1.75430857602957 1.75431160863772 4.60906973422592 4.50309631089524 2516176.278456264 4.20395785616127 724.931654914944 34.1671064961154 -84.3529910090062 3576719.86010433 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
2188-May-08 18:43 00:05 Jupiter 1.85141811327402 1.85141549655841 1.85142073015265 4.29914252358746 4.19137540804142 2520339.279630300 5.15481129254313 922.423031657453 35.3927468290036 -81.6252765141507 3382279.40723951 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20
2199-Sep-09 21:13 00:06 Jupiter 1.99218586039925 1.99218259972766 1.99218912109644 3.86427809848024 3.75263911798262 2524480.384318626 6.33565659478942 408.333605303424 43.7242591956129 -64.7521195405625 3327540.66887402 T 34 CATAB v2.0f-lin.ifort 2019-Nov-07 02:20:25 2019-Nov-07 02:20

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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