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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
334 Chicago (A892 QB)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000334
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 168 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02394773097799908 1.9349e-08  
a 3.888019614670872 1.8019e-08 au
q 3.79491036690155 7.248e-08 au
i 4.643542553090851 1.6268e-06 deg
node 130.169826608661 6.2002e-06 deg
peri 150.6942708748765 4.64e-05 deg
M 338.5237669832731 4.2558e-05 deg
tp 2459563.550086307216
(2021-Dec-15.05008631)
0.00033097 TDB
period 2800.21319491919
7.67
1.9466e-05
5.33e-08
d
yr
n .1285616397541434 8.9372e-10 deg/d
Q 3.981128862440194 1.845e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3643  
   data-arc span      47101 days (128.96 yr)  
   first obs. used      1892-08-24  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42054  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:29:44  

Additional Information
 Earth MOID = 2.77919 au 
 Jupiter MOID = 1.07717 au 
 T_jup = 3.061 
[ 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 7.65   n/a E2021B10  
diameter diameter 198.770 km 5.597 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 7.361 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Jutzeler, E.C.; Hausel, E.; Leake, M.; Burke, A. (2007) J. SE Assoc. for Research in Astron. 1, 2-6.]
[Strabla, L.; Quadri, U.; Girelli, R. (2011) Minor Planet Bull. 38, 169-172.]
[Slyusarev, I.G.; Shevchenko, V.G.; Belskaya, I.N.; Krugly, Yu.N.; Chiorny, V.G. (2012) ACM 2012, #6398.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.041   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.736   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=5.04, mean=9.38, max.=14.21) deg.
U-B UB 0.358   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=5.04, mean=9.48, max.=14.21) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

334 Chicago (A892 QB)          Discovered 1892-Aug-23 by Wolf, M. at Heidelberg
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
1916-Nov-29 11:32 00:02 Jupiter 1.10385235905529 1.103852131755 1.1038525863559 1.59794376918256 1.00933541672336 2421196.980724814 2.21474656746308 134.620408156176 48.2739393668413 56.1126839142867 4533502.24842884 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
1939-Jan-13 09:59 00:02 Jupiter 1.22626002220268 1.22625957560475 1.22626046880138 2.2405342085452 1.90749065857735 2429276.916279529 1.55535835245653 68.7058374052127 5.9405468509081 -88.9323283096029 5675962.97484499 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
1960-Oct-22 10:26 00:01 Jupiter 1.53885953697994 1.53885913828915 1.53885993567072 2.9769590815201 2.78593626918891 2437229.934638267 1.17622419684335 23.0110386942515 12.3833613577909 -59.7112705868726 5150723.28905292 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
1982-Jun-05 02:37 < 00:01 Jupiter 1.67892410489094 1.67892386210044 1.67892434768144 3.05195716350134 2.881915372461 2445125.609077001 0.789828222026637 26.8024224807376 8.20152593304323 -82.1430353877574 6926578.85011226 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2004-Jan-14 02:11 < 00:01 Jupiter 1.46898154025568 1.46898127693279 1.46898180357856 2.49089851794981 2.24752416413348 2453018.590839159 0.405106197635595 19.5265325567951 4.86267731515209 -73.8047431891933 6222567.8047272 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2025-Nov-09 09:12 < 00:01 Jupiter 1.1810215048281 1.18102130375632 1.18102170589975 1.77014863434789 1.30347095796974 2460988.883635835 0.560999958075575 31.9376979513155 19.6859929796847 -62.5610415195772 5114626.39667506 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2047-Dec-29 16:36 00:02 Jupiter 1.12457925081283 1.1245789822028 1.12457951942299 1.56009134087643 0.963069991661715 2469074.191483648 1.5875884719139 115.731583070623 37.305104885379 38.5750726388917 5196175.42798345 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2069-Dec-20 20:21 00:03 Jupiter 1.29849430357264 1.29849374230548 1.2984948648429 2.4450173270822 2.16182495213847 2477101.347661880 2.68952086285682 120.081758660443 4.35707954862147 -87.5653209655872 6014267.09343056 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2091-Sep-17 10:23 00:03 Jupiter 1.57032297448917 1.57032245613601 1.57032349284358 3.27243703051413 3.10323322914899 2485041.932646186 3.35964725071662 84.4988094433992 9.49147261760771 -73.8377083089897 7297128.25879684 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2113-May-07 05:21 00:04 Jupiter 1.65171467339414 1.65171426029412 1.65171508649509 2.97468764347914 2.79698738860641 2492943.723007138 3.95511136117113 74.2560864907311 6.81317663009789 -83.98796229712 7233652.63247446 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2134-Dec-11 13:39 00:04 Jupiter 1.41108119565864 1.41108003971787 1.41108235160638 2.16068519921026 1.86226494690174 2500832.068564293 4.31091445289677 184.435116054566 2.32623933009231 -81.8830056151714 5209177.75460687 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2156-Oct-29 08:07 00:04 Jupiter 1.14119690334464 1.1411964242026 1.1411973824935 1.67284867794037 1.14628828664206 2508824.838133344 4.17864095220525 200.993116706668 45.8369878084031 81.5824839161072 4168660.54013325 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2178-Dec-24 00:35 00:05 Jupiter 1.15768626975511 1.15768543783244 1.15768710167963 1.68174094120013 1.16831085668633 2516915.524010591 5.4713582291298 158.732674217337 25.0174627772018 55.9994666203174 4498147.98937439 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31
2200-Oct-28 06:37 00:07 Jupiter 1.3877682131139 1.38776693145137 1.38776949479876 2.70801551272771 2.47237752716678 2524893.775463261 6.99123309764518 304.843511003268 6.49146768740897 -85.5405655971924 6104286.65498198 T 168 CATAB v2.0g-lin.ifort 2021-Aug-25 06:31:04 2021-Aug-25 06:31

Alternate Designations
 A892 QB = A903 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-27 08:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin