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100P/Hartley 1
Classification: Jupiter-family Comet          SPK-ID: 1000040
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457480.5 (2016-Apr-02.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4134786792221094 2.4186e-07  
a 3.427940716240055 4.925e-07 au
q 2.010560316437425 9.4651e-07 au
i 25.5893256385759 5.3004e-05 deg
node 37.72517557568391 3.9237e-05 deg
peri 181.8620694828777 0.00027536 deg
M 359.9961498174051 0.00010406 deg
tp 2457480.524792893010
(2016-Apr-02.02479289)
0.0006701 JED
period 2318.186544039033
6.35
0.00049959
1.368e-06
d
yr
n .1552938010643281 3.3467e-08 deg/d
Q 4.845321116042685 6.9614e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.852560107862985E-9 2.334E-10
A2 [EST] -6.172365669301005E-11 1.26E-11
A3 [EST] -8.400246975582376E-10 2.207E-10
  Orbit Determination Parameters
   # obs. used (total)      307  
   data-arc span      11264 days (30.84 yr)  
   first obs. used      1985-06-13  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .65234  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2016-Apr-21 14:18:18  

Additional Information
 Earth MOID = 1.00326 au 
 Jupiter MOID = .135837 au 
 T_jup = 2.851 
[ 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 8. mag n/a ICQ 2003 Handbook  
comet total magnitude slope K1 25.0   n/a ICQ 2003 Handbook  

100P/Hartley 1          Discovered 1985-Jun-13 by Hartley, Malcolm at U. K. Schmidt Telescope Unit
discovered on plate/photo taken on discovery date
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
1905-Mar-07 13:09 00:23 Jupiter 0.176923994015925 0.176865538048577 0.176983737520165 7.00739041844016 6.28717209672321 2416912.047782677 22.9859565128589 3119.0502439318 186.05799388091 83.7357398807432 16189.4328229578 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
1917-Jan-31 05:30 00:18 Jupiter 1.16045217593058 1.15944012908067 1.16146362450092 8.66777995933277 8.5831576253251 2421259.729055690 17.6097752747111 10416.7944362207 421.948864246681 -3.01098228974051 3802.69962098445 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
1976-Mar-07 06:25 00:05 Jupiter 1.70486126468026 1.70484299003186 1.7048795395186 9.56427496289198 9.51218691541267 2442844.767623631 4.59109669813629 397.248061912623 70.5693720419981 27.6815775504271 280620.272498774 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
1988-Feb-05 06:43 00:02 Jupiter 0.356915650076319 0.356888654697848 0.356942645485731 6.70155315471357 6.33754440361403 2447196.779742216 1.5804790904534 156.126259135372 47.9010277922678 -18.5560554413618 52725.0097191926 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
1999-Nov-24 18:32 < 00:01 Jupiter 0.758688372334197 0.75866304663282 0.758713697802598 7.12180943506764 6.96328295282093 2451507.272105405 0.873119111760556 168.456958316628 17.7176135935782 -1.54889539284406 81725.6812390123 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
2083-Feb-10 15:54 00:12 Jupiter 0.636882286964863 0.636439474959197 0.637325028202116 6.7298998880587 6.52929166293573 2481901.162280249 12.4571607904352 2701.13264741557 78.1989202943714 -1.68699665313312 5046.19833557612 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
2094-Dec-04 22:13 00:08 Jupiter 0.471707431041225 0.471506008529871 0.47190884471098 6.58109820620015 6.30234472831803 2486216.425563124 8.13341114825521 1198.58382019961 86.3886385614775 14.8955916760103 23147.5182189581 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
2106-Dec-03 20:02 00:11 Jupiter 1.60133695417412 1.60090893082207 1.60176489523681 9.06815861281372 9.00963964067957 2490597.335033678 10.8741749009517 5763.39925237226 240.484278871977 -13.6891091489684 35775.4917998709 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
2164-Apr-29 03:29 00:27 Earth 0.487501309298061 0.487434684882338 0.487573181255189 12.6013756171796 12.6009418805629 2511563.645199661 27.4275362370503 57733.1373146961 1259.51377060474 -88.1804681480084 43349.5914256564 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
2166-Jan-30 15:29 00:23 Jupiter 1.85612190061533 1.85541632043225 1.85682727724967 10.8016914154473 10.7593613936271 2512205.145229124 22.7962355879878 9695.97907614024 1215.63875794074 -1.76242657497398 5253.87617786914 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
2177-Oct-12 04:59 00:34 Jupiter 0.443090980997942 0.442270010366747 0.443912140504671 7.15145921986031 6.87896247658501 2516477.707846697 34.0815584019056 6082.4507258262 660.051408331314 -29.2303307012111 5862.40990317449 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22
2189-Aug-20 06:21 00:55 Jupiter 0.765647493066769 0.764517075246249 0.766777123168819 7.77067213220319 7.6269771301027 2520807.764816034 54.685776944007 9127.20945184657 1076.69000607189 2.70241299285447 1725.55805129476 T 16 CATAB v2.0c-linF95 2016-Apr-21 14:22:02 2016-Apr-21 14:22

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1990.9   100P/1991 E1   1991 VII   1991j 
 1984.5   100P/1985 L1   1985 VII   1985f 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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