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19917 Dazaifu (1977 EE8)
Classification: Outer Main-belt Asteroid          SPK-ID: 2019917
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04635395715133668 4.3071e-08  
a 3.388559137319182 2.2417e-08 au
q 3.231486012263118 1.4784e-07 au
i 1.863988149833772 4.3859e-06 deg
node 308.2629420663009 0.00012859 deg
peri 239.8257278751007 0.00013621 deg
M 355.2974316556671 4.3794e-05 deg
tp 2459230.261419824878
(2021-Jan-15.76141982)
0.00027713 TDB
period 2278.35309397842
6.24
2.2609e-05
6.19e-08
d
yr
n .1580088709478188 1.568e-09 deg/d
Q 3.545632262375245 2.3456e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1659  
   data-arc span      16082 days (44.03 yr)  
   first obs. used      1977-03-12  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54128  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:00:30  

Additional Information
 Earth MOID = 2.23188 au 
 Jupiter MOID = 1.42474 au 
 T_jup = 3.147 
[ 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 13.38   n/a E2021B10  
rotation period rot_per 5.219 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

19917 Dazaifu           Discovered 1977 Mar. 12 by H. Kosai and K. Hurukawa at Kiso.
In the second half of the 7th century, the Dazaifu government office was in charge of the Kyushu area and the two islands of Iki and Tsushima, and it was a base of defense and diplomatic relations at that time. The corner stones of the remains of the capital towers 'tofuro' remain in Dazaifu city.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-09-25Last Updated: 2018-10-01

[ 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
1907-Mar-27 04:36 00:04 Jupiter 1.86511136082637 1.86510992744816 1.86511279420427 3.45597756949637 3.32197231513929 2417661.691467378 3.52283389678619 60.9353636530342 42.1327848976471 17.5882329067231 1350658.55347395 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
1959-Sep-22 14:01 00:02 Jupiter 1.92283474205702 1.92283389422183 1.92283558989231 3.27249630002806 3.13499883131474 2436834.083828003 1.96532063534978 63.7505674211545 21.6739321928151 64.4368915867888 2629442.86372071 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
1972-Dec-02 05:31 00:02 Jupiter 1.64661792245432 1.6466171277886 1.64661871711967 2.46510352146948 2.24676047599137 2441653.729938643 1.62049763462289 48.8024734325186 19.4474769774054 84.4835453713797 1798060.04510533 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
1986-Feb-21 04:45 00:01 Jupiter 1.42071217249259 1.42071165001002 1.4207126949767 1.7879120914232 1.41571120442925 2446482.698246256 1.14539506609529 124.756858995074 41.4017176582885 68.9198532803938 2741840.2654528 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
1999-May-18 10:17 < 00:01 Jupiter 1.38234665198663 1.38234617715389 1.38234712681969 1.57299909701252 1.11751564011345 2451316.928582235 0.647734948930371 136.137822290599 84.2588396719188 48.5545214988978 2086557.83966546 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2012-Aug-22 16:44 < 00:01 Jupiter 1.56228581039959 1.5622853689091 1.56228625188999 2.28537860502562 2.03435933689857 2456162.197260632 0.269451739836906 47.8954354076465 8.65726957633735 -85.5510995133954 2577317.54513982 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2025-Nov-12 10:44 < 00:01 Jupiter 1.8323848267442 1.83238439194503 1.83238526154336 3.29949558697333 3.1562902691884 2460991.947208274 0.411365903162413 43.2502405637305 16.4793122957063 -89.3685743756117 3482866.02693412 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2078-May-07 13:13 00:02 Jupiter 1.95600451349722 1.95600374855294 1.95600527844173 3.44615767924653 3.31812123971664 2480161.051013555 1.85407951025559 63.720922348462 21.5341766890075 66.3699244484542 3080187.6398435 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2091-Jul-14 18:26 00:02 Jupiter 1.68421890242743 1.68421786506645 1.68421993978803 2.63105206607218 2.43240636916361 2484977.268152521 2.36073226920762 50.6740817129709 29.7760730684385 69.6922799917814 1636194.5798983 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2104-Oct-04 13:29 00:03 Jupiter 1.44362578523046 1.44362492175274 1.44362664871261 1.85690444119984 1.50818719847699 2489807.061969535 2.87740640371728 176.933092106472 34.9049666611035 77.3164585451198 2671438.90579618 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2117-Dec-30 03:34 00:03 Jupiter 1.37280641154213 1.37280591320848 1.37280690987553 1.52538074988495 1.04536359249087 2494641.648352306 3.43640923546992 164.508341296515 105.763903294483 38.4231001569124 1864286.95624506 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2131-Apr-03 15:05 00:04 Jupiter 1.52377464254838 1.52377333388446 1.52377595121188 2.13496483622382 1.85643000335279 2499484.128268371 3.96423308366332 100.093875950817 12.2767126212269 -85.2382180872864 1468237.54845945 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2144-Jun-24 17:41 00:04 Jupiter 1.79511852550096 1.79511687184464 1.79512017915667 3.12648748119853 2.97173831462253 2504315.236921166 4.22472098830946 65.8873930445069 42.2778873821304 19.7175365773462 1116253.13682586 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00
2196-Dec-17 21:32 00:06 Jupiter 1.98790610410808 1.98790420652696 1.98790800169179 3.61418431193367 3.4943028872967 2523484.397358843 5.54868338408196 155.022164247339 24.0248715200805 58.772432721904 2769202.51888048 T 32 CATAB v2.0g-lin.ifort 2021-May-04 03:00:36 2021-May-04 03:00

Alternate Designations
 1977 EE8 = 1998 RC20 = 1998 SU5 = 1999 VL163 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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