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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04900328310552975 4.7169e-08  
a 3.222477317909719 2.095e-08 au
q 3.064565349599041 1.5104e-07 au
i 15.44842554996181 4.887e-06 deg
node 33.62383507494757 1.6389e-05 deg
peri 148.3534346077556 4.4424e-05 deg
M 106.7569080062417 4.0734e-05 deg
tp 2457973.919728312377
(2017-Aug-08.41972831)
0.00023909 TDB
period 2112.920859363557
5.78
2.0604e-05
5.641e-08
d
yr
n .1703802574548094 1.6615e-09 deg/d
Q 3.380389286220397 2.1976e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2343  
   data-arc span      29267 days (80.13 yr)  
   first obs. used      1939-10-18  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44394  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:21:02  

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 1.75393482278901 1.7539339869327 1.75393565866765 4.94724952515793 4.84865175340643 2416812.364348307 3.49992500623995 354.637685999877 16.1395129867768 -84.0588373973017 3180760.73817495 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
1916-Apr-30 07:33 00:03 Jupiter 1.73949030876567 1.73948984709561 1.73949077043809 4.76476469385453 4.66144915407757 2420983.814270739 3.00183094580565 256.027885128415 21.2044043811304 -87.6095013649972 3064075.40488261 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
1927-Sep-28 22:09 00:03 Jupiter 1.79008027101402 1.79007937161468 1.79008117044449 4.4600565229218 4.35267190970821 2425152.422766947 2.67166693129779 496.860328922871 28.6192393383123 -85.4824043256221 3623622.62694494 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
1939-Feb-15 03:48 00:02 Jupiter 1.88927280024887 1.88927171051185 1.88927389000812 4.01416572428048 3.90087955940395 2429309.658277240 2.45705028631245 411.770707880365 31.8073291647755 -82.7996850161664 3218800.26459675 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
2131-Apr-28 10:57 00:03 Jupiter 1.9713105379779 1.97130861539812 1.97131246057191 4.68085092948273 4.58813859517977 2499508.956526305 3.03688855376361 289.282530279978 17.6902707226592 -70.6252598846989 3864068.37122188 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
2142-Sep-06 10:08 00:03 Jupiter 1.82390494931373 1.82390339225165 1.82390650640288 4.82768631236859 4.73051307695033 2503657.922462837 3.07058984867115 376.081396269679 19.1889686002164 -78.3626303297421 3546996.00176727 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
2154-Feb-02 08:34 00:03 Jupiter 1.73313231303144 1.7331314548123 1.73313317127541 4.85699808907501 4.75531107368183 2507824.856619559 3.21247979241193 375.644940850574 17.4180057589558 -84.1232641583649 3371761.26285429 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
2165-Jul-10 05:41 00:04 Jupiter 1.71144785832202 1.71144734356355 1.71144837308156 4.78543380711358 4.68087013323844 2512000.736811595 3.56538764046191 278.670480734495 24.756023844529 -88.4271060983459 3651930.60692001 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
2176-Dec-14 18:41 00:04 Jupiter 1.75431009774662 1.75430858151803 1.75431161406665 4.60906970472016 4.50309628102873 2516176.278444828 4.20290445119482 724.373054138213 34.0345643834506 -84.3436784742886 3588957.16464545 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
2188-May-08 18:43 00:05 Jupiter 1.85141811848537 1.85141550214125 1.85142073499241 4.29914258811965 4.19137547454009 2520339.279635067 5.15364030922093 922.068481507853 35.2369707210961 -81.6208205148488 3390329.14086214 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21
2199-Sep-09 21:13 00:06 Jupiter 1.99218586440256 1.99218260466046 1.99218912417025 3.86427809417139 3.75263911377326 2524480.384313599 6.33417880428146 408.162090373405 43.5307062160464 -64.7423110901702 3329721.34767039 T 36 CATAB v2.0f-lin.ifort 2019-Dec-13 21:21:14 2019-Dec-13 21:21

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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