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103P/Hartley 2
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000041
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2454980.5 (2009-May-29.0) TDB
Reference: JPL 251 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6949264023325195 6.4924e-09  
a 3.469764682529919 3.7618e-08 AU
q 1.058533594758966 2.32e-08 AU
i 13.61715960790553 2.194e-06 deg
node 219.7738694367208 6.6677e-06 deg
peri 181.2178536214435 6.4912e-06 deg
M 281.105428824461 1.1885e-06 deg
tp 2455497.860275640459
(2010-Oct-28.36027564)
5.9297e-06 JED
period 2360.741638561709
6.46
3.8391e-05
1.051e-07
d
yr
n .15249445094692 2.4799e-09 deg/d
Q 5.880995770300872 6.376e-08 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
AJ1 [EST] 2.477513858655444E-9 4.764E-11
AJ2 [EST] 4.256439146454415E-9 4.17E-11
ALF [SET] 93.05206777907777 n/a
DEL [SET] -1.38277922386182 n/a
ET1 [SET] 30. n/a
ET2 [SET] 135. n/a
  Orbit Determination Parameters
   # obs. used (total)      6506  
   data-arc span      9922 days (27.16 yr)  
   first obs. used      1986-03-15  
   last obs. used      2013-05-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .68296  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:41:44  

Additional Information
 Earth MOID = .0656851 AU 
 T_jup = 2.641 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.2 mag 1. 251 from 680 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 16.   n/a 251 autocmod 2.5c
comet nuclear magnitude M2 16.9 mag 1. 251 from 4749 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 251 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 251 autocmod 2.5c
diameter diameter 1.6 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  
rotation period rot_per 18.1 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Harmon, J.K.; Nolan, M.C; Howell, E.S.; Giorgini, J.D. (2010) CBET 2515.]
[Belton, M.J.S.; Thomas, P.; Li, J.-Y.; Williams, J.; et al. (2013) Icarus 222, 595-609.]

103P/Hartley 2          Discovered 1986-Mar-15 by Hartley, Malcolm at U. K. Schmidt Telescope Unit, Siding Spring
Reference: comet.disLast 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
1900-Mar-20 22:58 2_21:50 Jupiter 0.278579495150861 0.146276010304389 0.401869074736124 7.89771497468583 7.50285882953536 2415099.456794268 4190.12142329646 860119.261563046 17.5759618285302 1.05075576856312 1651.37309935858 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
1932-Nov-01 06:09 1_09:50 Jupiter 1.7041281915953 1.70086480975078 1.70811698616924 6.85766283299738 6.78479597580875 2427012.756279909 2029.83980854404 222791.098009002 58.0717235571839 50.4988494946659 386971.553250046 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
1947-Aug-25 14:26 00:27 Jupiter 0.20350420220911 0.202353219445944 0.204654838845125 7.83142949123839 7.28058474038608 2432423.101253930 26.7593642413559 7629.63205025079 7.77597754078719 -13.9285826962613 114001.524215868 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
1971-Apr-28 19:55 < 00:01 Jupiter 0.0852791480269209 0.0852712525973797 0.0852870434538375 8.33053258009044 7.03797336477589 2441070.329679623 0.532411943632931 48.2456281988912 7.1735285878404 -7.73358189255523 43131.2767773758 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
1982-Nov-02 13:04 00:01 Jupiter 0.325518482049387 0.325515211419982 0.325521752724478 6.64179146794888 6.23772794984719 2445276.044389717 1.30030407520201 25.0729473236987 1.40034059065154 51.1303279755411 2960122.50594413 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
1993-Dec-19 07:08 < 00:01 Jupiter 0.374273634445916 0.374272327789489 0.374274941105486 7.10442238912126 6.77839191033698 2449340.797502764 0.177068851085861 11.4175108392011 3.59863327137405 46.9705594404329 1388423.92011544 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2005-Dec-10 10:28 < 00:01 Jupiter 1.8261766424007 1.82617545456883 1.82617783023165 11.7473495650566 11.7077997948765 2453714.936391540 0.0467658987363898 16.0651918487509 3.5901034251148 12.6279230485907 4540928.79338974 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2010-Oct-20 17:33 < 00:01 Earth 0.12087827320636 0.120878185137612 0.1208783612751 11.8796441494286 11.8777885056998 2455490.231557999 0.00638303637540331 3.499639698797 1.96272032200353 6.14820957587886 3813866.01260067 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2023-Sep-26 05:55 < 00:01 Earth 0.382539548460882 0.382530422637924 0.382548674272722 18.2802859515283 18.2799049229441 2460213.746357408 0.241694612359759 438.074869866398 9.91667833523205 -7.4210204391161 645339.764424075 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2054-Mar-18 21:16 < 00:01 Jupiter 0.717758455489648 0.717740245712249 0.717776665166222 8.51126160675706 8.37146259301741 2471345.385889182 0.50379332918356 163.976365917852 17.5795554152264 -19.4882400531043 297932.606341572 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2065-Nov-13 19:51 < 00:01 Jupiter 0.267564065168662 0.267559404516649 0.267568725841434 6.90624798179265 6.43155493631339 2475603.326910073 0.57603404116227 25.2732665858517 15.0584709006782 29.960652587754 216612.317223575 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2076-Dec-11 09:18 < 00:01 Jupiter 0.246209601654567 0.246205121661355 0.24621408165434 6.99182554058959 6.4811360831623 2479648.887762764 0.448524364455499 23.556209737665 9.74027167368818 -1.12681513834386 179915.663061769 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2088-Jul-29 06:03 < 00:01 Jupiter 0.473506707858057 0.473498401002424 0.473515014671919 8.11842685157741 7.89501086809612 2483896.751831112 0.801220247815771 66.1669901580063 7.26833853361373 11.9438062367273 298904.669587407 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2136-Dec-20 04:02 00:03 Jupiter 1.44756103083438 1.44751640752041 1.44760565364266 10.3228834234088 10.2660433856439 2501571.667893040 2.77196841016544 655.842238251004 25.2725189050641 -22.5606999782655 562083.317974292 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2148-Aug-24 00:02 00:04 Jupiter 0.448298256040484 0.448286747612582 0.448309765218102 6.58063681775321 6.28696637256359 2505836.501197516 4.2942662870825 102.894889401209 12.0051883328953 61.9927025085222 537979.130957193 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2159-Aug-28 14:33 < 00:01 Jupiter 0.23824332968822 0.238196674387565 0.238289985389748 7.94274152303651 7.48174955691893 2509858.106174366 0.975524139301812 344.787102868242 24.6466138896652 23.7601284333035 75371.6557584882 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2178-Oct-25 22:44 00:01 Earth 0.319552919373559 0.31870353227873 0.320407874887624 8.71142418908093 8.71046698560663 2516856.446965130 1.12220748388134 49717.1112772187 21.43580120446 -56.7856545221696 1148869.238565 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52
2195-Mar-29 12:10 00:21 Jupiter 0.089208090389185 0.0888712635530176 0.0895509729607038 8.12924010094807 6.86256007297989 2522855.006702653 20.7723851245593 4892.65097364695 24.2362415282298 -67.7090793932405 66247.6388776094 T 251 CATAB v2.0c-linF95 2014-Jun-18 07:52:01 2014-Jun-18 07:52

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1991.4   103P/1991 N1   1991 XV   1991t 
 1985.0   103P/1986 E2   1985 V   1986c 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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