Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04920879065216378 1.504e-08  
a 3.220817033237462 1.7258e-08 au
q 3.062324522119957 5.5966e-08 au
i 15.44891453679375 4.2359e-07 deg
node 33.60593683825253 8.1581e-07 deg
peri 147.4479162696979 1.8507e-05 deg
M 210.0247244407576 2.0505e-05 deg
tp 2460080.058390992808
(2023-May-15.55839099)
0.00012151 TDB
period 2111.288141173197
5.78
1.6969e-05
4.646e-08
d
yr
n .1705120172748925 1.3704e-09 deg/d
Q 3.379309544354968 1.8107e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2988  
   data-arc span      29725 days (81.38 yr)  
   first obs. used      1939-10-18  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4059  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:20:14  

Additional Information
 Earth MOID = 2.07 au 
 Jupiter MOID = 1.59402 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 11.17   n/a E2021B10  
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. 2020-October); 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 00:02 Jupiter 1.75393509984248 1.75393473239572 1.75393546729722 4.94725267201232 4.84865498053553 2416812.364870288 2.46438246695685 190.404527255376 2.13123770675259 -84.6802078039506 43343768.6526554 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
1916-Apr-30 07:33 00:02 Jupiter 1.73949054601288 1.73949021191196 1.73949088011419 4.76476806544938 4.6614526152241 2420983.814723835 2.14462983420627 56.0590055412972 11.9372441504469 -75.9349197395286 15108021.3019144 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
1927-Sep-28 22:09 00:02 Jupiter 1.79008057090497 1.79007980875056 1.79008133308462 4.46005970888025 4.35267519307978 2425152.423123086 1.94943459998953 342.402610482246 2.83233924203183 -83.2340536407791 16839321.526388 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
1939-Feb-15 03:48 00:02 Jupiter 1.88927321919755 1.88927231585737 1.88927412255673 4.01416826535472 3.90088220039497 2429309.658528049 1.83166908728612 307.047623249603 2.36734332788709 -80.7605045191158 12278198.5762245 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
2131-Apr-28 10:57 00:02 Jupiter 1.97131045860862 1.97130887040007 1.97131204682669 4.68085399728686 4.58814172172169 2499508.956396998 2.46221665749013 232.673404826263 3.99051636045436 -69.8311183791003 26058009.7738285 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
2142-Sep-06 10:08 00:02 Jupiter 1.82390493176185 1.8239036126108 1.82390625093178 4.82768954464642 4.73051637522251 2503657.922371653 2.45349635644245 302.659352344317 2.49668427356328 -77.4081510072721 39127224.4242831 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
2154-Feb-02 08:33 00:03 Jupiter 1.73313243846927 1.73313168960482 1.73313318735264 4.85700122560204 4.75531428528613 2507824.856548886 2.51304190460448 290.827568252614 1.54842021176214 -82.7504623345698 44336739.1297925 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
2165-Jul-10 05:41 00:03 Jupiter 1.71144817625234 1.71144805664987 1.71144829585481 4.78543665492962 4.68087306489591 2512000.736718384 2.72428587558016 114.467966090999 6.46965122591197 89.4013141046356 26291967.5044368 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
2176-Dec-14 18:41 00:03 Jupiter 1.75431065019665 1.75430971198917 1.7543115884445 4.60907201275357 4.5030986777352 2516176.278284250 3.15045067822429 428.181908622133 3.04505567934716 -83.2962626082209 16107077.2322844 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
2188-May-08 18:42 00:04 Jupiter 1.85141894329579 1.85141714729217 1.85142073938759 4.29914371701737 4.19137668169423 2520339.279301350 3.82199168155015 651.816233239675 1.97379488319152 -81.4876157782734 14354751.5890659 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22
2199-Sep-09 21:13 00:05 Jupiter 1.99218689848989 1.99218458056333 1.99218921643117 3.86427768847012 3.75263875543908 2524480.383742095 4.68474121261374 298.119360483384 2.87712321733093 -64.5137089079358 10953340.0027294 T 43 CATAB v2.0f-lin.ifort 2021-Apr-12 14:22:15 2021-Apr-12 14:22

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-17 05:27 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin