user
Instruction
Answer the question based on the provided table.


Table
Table Title: List of periodic comets
Table Content:
| Comet | Discoverer(s) or namesake(s) | Orbital period (years) | Spacecraft encounter(s) |
| --- | --- | --- | --- |
| 1P/Halley | Halley | 75.32 | Giotto (flyby 1986), Vega 1 (flyby 1986), Vega 2 (flyby 1986), Suisei (flyby 1986) ICE (distant flyby 1986), Sakigake (distant flyby 1986) |
| 2P/Encke | Encke | 3.30 |  |
| 3D/Biela | Biela |  |  |
| 4P/Faye | Faye | 7.51 |  |
| 5D/Brorsen | Brorsen |  |  |
| 6P/d'Arrest | d'Arrest | 6.54 |  |
| 7P/Pons–Winnecke | Pons & Winnecke | 6.36 |  |
| 8P/Tuttle | Tuttle | 13.61 |  |
| 9P/Tempel (Tempel 1) | Tempel | 5.58 | Deep Impact (impactor/flyby 2005), Stardust (flyby 2011) |
| 10P/Tempel (Tempel 2) | Tempel | 5.37 |  |
| 11P/Tempel–Swift–LINEAR | Tempel & Swift & LINEAR | 6.37 |  |
| 12P/Pons–Brooks | Pons & Brooks | 70.85 |  |
| 13P/Olbers | Olbers | 69.52 |  |
| 14P/Wolf | Wolf | 8.74 |  |
| 15P/Finlay | Finlay | 6.50 |  |
| 16P/Brooks (Brooks 2) | Brooks | 6.14 |  |
| 17P/Holmes | Holmes | 6.88 |  |
| 18D/Perrine–Mrkos | Perrine & Mrkos |  |  |
| 19P/Borrelly | Borrelly | 6.85 | Deep Space 1 (flyby 2001) |
| 20D/Westphal | Westphal |  |  |
| 21P/Giacobini–Zinner | Giacobini & Zinner | 6.60 | ICE (distant flyby 1985) |
| 22P/Kopff | Kopff | 6.43 | CRAF (rendezvous/lander 2000 – cancelled) |
| 23P/Brorsen–Metcalf | Brorsen & Metcalf | 70.52 |  |
| 24P/Schaumasse | Schaumasse | 8.25 |  |
| 25D/Neujmin (Neujmin 2) | Neujmin |  |  |
| 26P/Grigg–Skjellerup | Grigg & Skjellerup | 5.31 | Giotto (flyby 1992) |
| 27P/Crommelin | Crommelin | 27.93 |  |
| 28P/Neujmin (Neujmin 1) | Neujmin | 18.17 |  |
| 29P/Schwassmann–Wachmann (Schwassmann–Wachmann 1) | Schwassmann & Wachmann | 14.69 |  |
| 30P/Reinmuth (Reinmuth 1) | Reinmuth | 7.34 |  |
| 31P/Schwassmann–Wachmann (Schwassmann–Wachmann 2) | Schwassmann & Wachmann | 8.75 |  |
| 32P/Comas Solá | Comas Solá | 8.80 |  |
| 33P/Daniel | Daniel | 8.07 |  |
| 34D/Gale | Gale |  |  |
| 35P/Herschel–Rigollet | Herschel & Rigollet | 155 |  |
| 36P/Whipple | Whipple | 8.55 |  |
| 37P/Forbes | Forbes | 6.35 |  |
| 38P/Stephan–Oterma | Stephan & Oterma | 37.72 |  |
| 39P/Oterma | Oterma | 19.53 |  |
| 40P/Väisälä (Väisälä 1) | Väisälä | 10.82 |  |
| 41P/Tuttle–Giacobini–Kresák | Tuttle & Giacobini & Kresák | 5.42 |  |
| 42P/Neujmin (Neujmin 3) | Neujmin | 10.70 |  |
| 43P/Wolf–Harrington | Wolf & Harrington | 6.13 |  |
| 44P/Reinmuth (Reinmuth 2) | Reinmuth | 7.08 |  |
| 45P/Honda–Mrkos–Pajdušáková | Honda & Mrkos & Pajdušáková | 5.26 |  |
| 46P/Wirtanen | Wirtanen | 5.44 | ICE (distant flyby 2018 – proposed), CHopper (lander 2022—proposed) |
| 47P/Ashbrook–Jackson | Ashbrook & Jackson | 8.35 |  |
| 48P/Johnson | Johnson | 6.95 |  |
| 49P/Arend–Rigaux | Arend & Rigaux | 6.73 |  |
| 50P/Arend | Arend | 8.25 |  |
| 51P/Harrington | Harrington | 7.13 |  |
| 52P/Harrington–Abell | Harrington & Abell | 7.54 |  |
| 53P/Van Biesbroeck | Van Biesbroeck | 12.6 |  |
| 54P/de Vico–Swift–NEAT | de Vico & Swift & NEAT | 7.38 |  |
| 55P/Tempel–Tuttle | Tempel & Tuttle | 33.24 |  |
| 56P/Slaughter–Burnham | Slaughter & Burnham | 11.54 |  |
| 57P/du Toit–Neujmin–Delporte | du Toit & Neujmin & Delporte | 6.40 |  |
| 58P/Jackson–Neujmin | Jackson & Neujmin | 8.24 |  |
| 59P/Kearns–Kwee | Kearns & Kwee | 9.51 |  |
| 60P/Tsuchinshan (Tsuchinshan 2) | Tsuchinshan | 6.56 |  |
| 61P/Shajn–Schaldach | Shajn & Schaldach | 7.06 |  |
| 62P/Tsuchinshan (Tsuchinshan 1) | Tsuchinshan | 6.63 |  |
| 63P/Wild (Wild 1) | Wild | 13.25 |  |
| 64P/Swift–Gehrels | Swift & Gehrels | 9.35 |  |
| 65P/Gunn | Gunn | 6.88 |  |
| 66P/du Toit | du Toit | 14.71 |  |
| 67P/Churyumov–Gerasimenko | Churyumov & Gerasimenko | 6.45 | Rosetta (orbiter 2014) |
| 68P/Klemola | Klemola | 10.83 |  |
| 69P/Taylor | Taylor | 7.65 |  |
| 70P/Kojima | Kojima | 7.06 |  |
| 71P/Clark | Clark | 5.53 |  |
| 72D/Denning–Fujikawa | Denning & Fujikawa |  |  |
| 73P/Schwassmann–Wachmann (Schwassmann–Wachmann 3) | Schwassmann & Wachmann | 5.36 |  |
| 74P/Smirnova–Chernykh | Smirnova & Chernykh | 8.51 |  |
| 75D/Kohoutek | Kohoutek | ~7 |  |
| 76P/West–Kohoutek–Ikemura | West & Kohoutek & Ikemura | 6.48 |  |
| 77P/Longmore | Longmore | 6.88 |  |
| 78P/Gehrels (Gehrels 2) | Gehrels | 7.22 |  |
| 79P/du Toit–Hartley | du Toit & Hartley | 5.28 |  |
| 80P/Peters–Hartley | Peters & Hartley | 8.12 |  |
| 81P/Wild (Wild 2) | Wild | 6.41 | Stardust (flyby/sample return 2004) |
| 82P/Gehrels (Gehrels 3) | Gehrels | 8.43 |  |
| 83D/Russell (Russell 1) | Russell |  |  |
| 84P/Giclas | Giclas | 6.97 |  |
| 85P/Boethin | Boethin | 11.81 |  |
| 86P/Wild (Wild 3) | Wild | 6.91 |  |
| 87P/Bus | Bus | 6.51 |  |
| 88P/Howell | Howell | 5.49 |  |
| 89P/Russell (Russell 2) | Russell | 7.26 |  |
| 90P/Gehrels (Gehrels 1) | Gehrels | 14.85 |  |
| 91P/Russell (Russell 3) | Russell | 7.67 |  |
| 92P/Sanguin | Sanguin | 12.43 |  |
| 93P/Lovas (Lovas 1) | Lovas | 9.20 |  |
| 94P/Russell (Russell 4) | Russell | 6.58 |  |
| 95P/Chiron = minor planet 2060 Chiron | Kowal | 50.50 |  |
| 96P/Machholz (Machholz 1) | Machholz | 5.28 |  |
| 97P/Metcalf–Brewington | Metcalf & Brewington | 10.51 |  |
| 98P/Takamizawa | Takamizawa | 7.40 |  |
| 99P/Kowal (Kowal 1) | Kowal | 15.25 |  |
| 100P/Hartley (Hartley 1) | Hartley | 6.35 |  |
| 101P/Chernykh | Chernykh | 13.94 |  |
| 102P/Shoemaker (Shoemaker 1) | C. Shoemaker & E. Shoemaker | 7.22 |  |
| 103P/Hartley (Hartley 2) | Hartley | 6.47 | Deep Impact (flyby 2010) |
| 104P/Kowal (Kowal 2) | Kowal | 5.89 |  |
| 105P/Singer Brewster | Singer-Brewster | 6.47 |  |
| 106P/Schuster | Schuster | 7.31 |  |
| 107P/Wilson–Harrington = minor planet 4015 Wilson–Harrington | Helin & Wilson & Harrington | 4.29 |  |
| 108P/Ciffréo | Ciffréo | 7.26 |  |
| 109P/Swift–Tuttle | Swift & Tuttle | 133.28 |  |
| 110P/Hartley (Hartley 3) | Hartley | 6.88 |  |
| 111P/Helin–Roman–Crockett | Helin & Roman & Crockett | 8.14 |  |
| 112P/Urata–Niijima | Urata & Niijima | 6.67 |  |
| 113P/Spitaler | Spitaler | 7.09 |  |
| 114P/Wiseman–Skiff | Wiseman & Skiff | 6.67 |  |
| 115P/Maury | Maury | 8.76 |  |
| 116P/Wild (Wild 4) | Wild | 6.51 |  |
| 117P/Helin–Roman–Alu (Helin–Roman–Alu 1) | Helin & Roman & Alu | 8.24 |  |
| 118P/Shoemaker–Levy (Shoemaker–Levy 4) | C. Shoemaker, E. Shoemaker & Levy | 6.44 |  |
| 119P/Parker–Hartley | Parker & Hartley | 8.89 |  |
| 120P/Mueller (Mueller 1) | Mueller | 8.43 |  |
| 121P/Shoemaker–Holt (Shoemaker–Holt 2) | C.Shoemaker, E.Shoemaker & Holt | 8.02 |  |
| 122P/de Vico | de Vico | 74.35 |  |
| 123P/West–Hartley | West & Hartley | 7.59 |  |
| 124P/Mrkos | Mrkos | 5.75 |  |
| 125P/Spacewatch | Spacewatch | 5.53 |  |
| 126P/IRAS | IRAS | 13.41 |  |
| 127P/Holt–Olmstead | Holt & Olmstead | 6.41 |  |
| 128P/Shoemaker–Holt (Shoemaker–Holt 1) | C. Shoemaker, E. Shoemaker & Holt | 9.59 |  |
| 129P/Shoemaker–Levy (Shoemaker–Levy 3) | C. Shoemaker, E. Shoemaker & Levy | 8.89 |  |
| 130P/McNaught–Hughes | McNaught & Hughes | 6.66 |  |
| 131P/Mueller (Mueller 2) | Mueller | 7.08 |  |
| 132P/Helin–Roman–Alu (Helin–Roman–Alu 2) | Helin & Roman & Alu | 8.28 |  |
| 133P/Elst–Pizarro = minor planet 7968 Elst–Pizarro | Elst & Pizarro | 5.62 |  |
| 134P/Kowal–Vávrová | Kowal & Vávrová | 15.6 |  |
| 135P/Shoemaker–Levy (Shoemaker–Levy 8) | C. Shoemaker, E. Shoemaker & Levy | 7.50 |  |
| 136P/Mueller (Mueller 3) | Mueller | 8.62 |  |
| 137P/Shoemaker–Levy (Shoemaker–Levy 2) | C. Shoemaker, E. Shoemaker & Levy | 9.55 |  |
| 138P/Shoemaker–Levy (Shoemaker–Levy 7) | C. Shoemaker, E. Shoemaker & Levy | 6.91 |  |
| 139P/Väisälä–Oterma | Väisälä & Oterma | 9.61 |  |
| 140P/Bowell–Skiff | Bowell & Skiff | 16.18 |  |
| 141P/Machholz (Machholz 2) | Machholz | 5.23 |  |
| 142P/Ge–Wang | Ge & Wang | 11.09 |  |
| 143P/Kowal–Mrkos | Kowal & Mrkos | 8.93 |  |
| 144P/Kushida | Kushida | 7.57 |  |
| 145P/Shoemaker–Levy (Shoemaker–Levy 5) | C. Shoemaker, E. Shoemaker & Levy | 8.66 |  |
| 146P/Shoemaker–LINEAR | C. Shoemaker, E. Shoemaker & LINEAR | 8.12 |  |
| 147P/Kushida–Muramatsu | Kushida & Muramatsu | 7.41 |  |
| 148P/Anderson–LINEAR | Anderson & LINEAR | 7.07 |  |
| 149P/Mueller (Mueller 4) | Mueller | 9.02 |  |
| 150P/LONEOS | LONEOS | 7.66 |  |
| 151P/Helin | Helin | 14.10 |  |
| 152P/Helin–Lawrence | Helin & Lawrence | 9.54 |  |
| 153P/Ikeya–Zhang | Ikeya & Zhang | 366.5 |  |
| 154P/Brewington | Brewington | 10.66 |  |
| 155P/Shoemaker (Shoemaker 3) | C. Shoemaker & E. Shoemaker | 17.09 |  |
| 156P/Russell–LINEAR | Russell & LINEAR | 6.84 |  |
| 157P/Tritton | Tritton | 6.29 |  |
| 158P/Kowal–LINEAR | Kowal & LINEAR | 10.26 |  |
| 159P/LONEOS | LONEOS | 14.32 |  |
| 160P/LINEAR | LINEAR | 7.95 |  |
| 161P/Hartley–IRAS | Hartley & IRAS | 21.43 |  |
| 162P/Siding Spring | Siding Spring | 5.32 |  |
| 163P/NEAT | NEAT | 7.30 |  |
| 164P/Christensen | Christensen | 6.97 |  |
| 165P/LINEAR | LINEAR | 76.7 |  |
| 166P/NEAT | NEAT | 51.73 |  |
| 167P/CINEOS | CINEOS | 64.85 |  |
| 168P/Hergenrother | Hergenrother | 6.89 |  |
| 169P/NEAT | NEAT | 4.20 |  |
| 170P/Christensen | Christensen | 8.63 |  |
| 171P/Spahr | Spahr | 6.70 |  |
| 172P/Yeung | Yeung | 6.59 |  |
| 173P/Mueller (Mueller 5) | Mueller | 13.63 |  |
| 174P/Echeclus = minor planet 60558 Echeclus | Spacewatch | 35.02 |  |
| 175P/Hergenrother | Hergenrother | 6.34 |  |
| 176P/LINEAR = minor planet 118401 LINEAR | LINEAR | 5.71 |  |
| 177P/Barnard (Barnard 2) | Barnard | 119.67 |  |
| 178P/Hug–Bell | Hug & Bell | 7.06 |  |
| 179P/Jedicke | Jedicke | 14.31 |  |
| 180P/NEAT | NEAT | 7.54 |  |
| 181P/Shoemaker–Levy (Shoemaker–Levy 6) | C. Shoemaker, E. Shoemaker & Levy | 7.53 |  |
| 182P/LONEOS | LONEOS | 5.02 |  |
| 183P/Korlevic–Juric | Korlevic & Juric | 9.58 |  |
| 184P/Lovas (Lovas 2) | Lovas | 6.62 |  |
| 185P/Petriew | Petriew | 5.47 |  |
| 186P/Garradd | Garradd | 10.62 |  |
| 187P/LINEAR | LINEAR | 9.40 |  |
| 188P/LINEAR–Mueller | LINEAR & Mueller | 9.13 |  |
| 189P/NEAT | NEAT | 4.99 |  |
| 190P/Mueller | Mueller | 8.74 |  |
| 191P/McNaught | McNaught | 6.64 |  |
| 192P/Shoemaker–Levy (Shoemaker–Levy 1) | C. Shoemaker, E. Shoemaker & Levy | 17.29 |  |
| 193P/LINEAR–NEAT | LINEAR & NEAT | 6.56 |  |
| 194P/LINEAR | LINEAR [1] | 8.00 |  |
| 195P/Hill | Hill | 16.49 |  |
| 196P/Tichý | Tichý IAUC 8917 | 7.36 |  |
| 197P/LINEAR | LINEAR IAUC 8924 | 4.85 |  |
| 198P/ODAS | OCA-DLR Asteroid Survey (ODAS)[2], IAUC 8929 | 6.78 |  |
| 199P/Shoemaker (Shoemaker 4) | C. Shoemaker & E. Shoemaker CBET 1347 | 14.53 |  |
| 200P/Larsen | Larsen | 10.92 |  |
| 201P/LONEOS | LONEOS [3] | 6.47 |  |
| 202P/Scotti | Scotti [4] | 7.32 |  |
| 203P/Korlevic | Korlevic IAUC 8974 | 10.01 |  |
| 204P/LINEAR–NEAT | LINEAR & NEAT IAUC 8974 | 7.00 |  |
| 205P/Giacobini | Giacobini (previously thought lost and designated D/1896 R2) IAUC 8975 | 6.66 |  |
| 206P/Barnard–Boattini | Barnard & Boattini [previously thought lost and designated D/1892 T1 (Barnard 3)] IAUC 8995 | 5.81 |  |
| 207P/NEAT | NEAT IAUC 8996 | 7.63 |  |
| 208P/McMillan | McMillan IAUC 8997, IAUC 9000 | 8.16 |  |
| 209P/LINEAR | LINEAR IAUC 9002 | 5.04 |  |
| 210P/Christensen | Christensen IAUC 9005 | 5.71 |  |
| 211P/Hill | Hill (Catalina Sky Survey) IAUC 9001 | 6.71 |  |
| 212P/NEAT | NEAT IAUC 9010 | 7.78 |  |
| 213P/Van Ness | Van Ness IAUC 9017 | 6.34 |  |
| 214P/LINEAR | LINEAR IAUC 9017 | 6.84 |  |
| 215P/NEAT | NEAT IAUC 9018 | 8.07 |  |
| 216P/LINEAR | LINEAR IAUC 9021 | 7.63 |  |
| 217P/LINEAR | LINEAR | 7.83 |  |
| 218P/LINEAR | LINEAR | 6.11 |  |
| 219P/LINEAR | LINEAR | 6.98 |  |
| 220P/McNaught | McNaught | 5.50 |  |
| 221P/LINEAR | LINEAR | 6.50 |  |
| 222P/LINEAR | LINEAR | 4.83 |  |
| 223P/Skiff | Skiff | 8.42 |  |
| 224P/LINEAR–NEAT | LINEAR & NEAT | 6.30 |  |
| 225P/LINEAR | LINEAR | 6.99 |  |
| 226P/Pigott–LINEAR–Kowalski | Pigott & LINEAR & Kowalski | 7.32 |  |
| 227P/Catalina–LINEAR | Catalina Sky Survey & LINEAR | 6.79 |  |
| 228P/LINEAR | LINEAR | 8.49 |  |
| 229P/Gibbs | Gibbs (Catalina Sky Survey) | 7.78 |  |
| 230P/LINEAR | LINEAR | 6.27 |  |
| 231P/LINEAR–NEAT | LINEAR & NEAT | 8.08 |  |
| 232P/Hill | Hill (Catalina Sky Survey) | 9.49 |  |
| 233P/La Sagra | La Sagra Sky Survey | 5.29 |  |
| 234P/LINEAR | LINEAR | 7.47 |  |
| 235P/LINEAR | LINEAR | 8.00 |  |
| 236P/LINEAR | LINEAR | 7.20 |  |
| 237P/LINEAR | LINEAR | 6.57 |  |
| 238P/Read | Read (Spacewatch) | 5.63 |  |
| 239P/LINEAR | LINEAR | 9.43 |  |
| 240P/NEAT | NEAT | 7.60 |  |
| 241P/LINEAR | LINEAR | 10.79 |  |
| 242P/Spahr | Spahr | 13.20 |  |
| 243P/NEAT | NEAT | 7.52 |  |
| 244P/Scotti | Scotti | 10.8 |  |
| 245P/WISE | WISE | 8.03 |  |
| 246P/NEAT | NEAT | 8.06 |  |
| 247P/LINEAR | LINEAR | 7.98 |  |
| 248P/Gibbs | Gibbs (Catalina Sky Survey) | 14.63 |  |
| 249P/LINEAR | LINEAR | 4.63 |  |
| 250P/Larson | Larson (Catalina Sky Survey) | 7.20 |  |
| 251P/LINEAR | LINEAR | 6.52 |  |
| 252P/LINEAR | LINEAR | 5.32 |  |
| 253P/PANSTARRS | Pan-STARRS | 6.47 |  |
| 254P/McNaught | McNaught | 10.09 |  |
| 255P/Levy | Levy | 5.29 |  |
| 256P/LINEAR | LINEAR | 9.96 |  |
| 257P/Catalina | Catalina Sky Survey | 7.27 |  |
| 258P/PANSTARRS | Pan-STARRS | 9.22 |  |
| 259P/Garradd | Garradd | 4.50 |  |
| 260P/McNaught | McNaught | 7.07 |  |
| 261P/Larson | Larson (Mount Lemmon Survey) | 6.80 |  |
| 262P/McNaught–Russell | McNaught & Russell | 18.3 |  |
| 263P/Gibbs | Gibbs (Catalina Sky Survey) | 5.36 |  |
| 264P/Larsen | Larsen | 7.68 |  |
| 265P/LINEAR | LINEAR | 8.77 |  |
| 266P/Christensen | Christensen | 6.63 |  |
| 267P/LONEOS | LONEOS | 5.96 |  |
| 268P/Bernardi | Bernardi | 9.76 |  |
| 269P/Jedicke | V. Jedicke & R. Jedicke | 19.55 |  |
| 270P/Gehrels | Gehrels | 17.82 |  |
| 271P/van Houten–Lemmon | C. van Houten & I. van Houten-Groeneveld & Mount Lemmon Survey | 18.42 |  |
| 272P/NEAT | NEAT | 9.36 |  |
| 273P/Pons–Gambart | Pons & Gambart | 188 |  |
| 274P/Tombaugh–Tenagra | Tombaugh & Tenagra II Observatory | 9.12 |  |
| 275P/Hermann | Hermann | 13.79 |  |
| 276P/Vorobjov | Vorobjov | 12.5 |  |
| 277P/LINEAR | LINEAR | 7.59 |  |
| 278P/McNaught | McNaught | 7.12 |  |
| 279P/La Sagra | La Sagra Sky Survey | 6.78 |  |
| 280P/Larsen | Larsen | 9.63 |  |
| 281P/MOSS | Morocco Oukaimeden Sky Survey (MOSS) | 10.69 |  |
| 282P |  | 8.76 |  |
| 283P/Spacewatch | Spacewatch | 8.40 |  |
| 284P/McNaught | McNaught | 7.04 |  |
| 285P/LINEAR | LINEAR | 9.52 |  |
| 286P/Christensen | Christensen | 8.37 |  |
| 287P/Christensen | Christensen | 8.54 |  |
| 288P/Spacewatch = minor planet (300163) 2006 VW139 | Spacewatch | 5.32 |  |
| 289P/Blanpain | Blanpain | 5.33 |  |
| 290P/Jäger | Jäger | 15.2 |  |
| 291P/NEAT | NEAT | 9.71 |  |
| 292P/Li | Li | 15.1 |  |
| 293P/Spacewatch | Spacewatch | 6.94 |  |
| 294P/LINEAR | LINEAR | 5.74 |  |
| 295P/LINEAR | LINEAR | 12.3 |  |
| 296P/Garradd | Garradd | 6.55 |  |
| 297P/Beshore | Beshore (Mount Lemmon Survey) | 6.39 |  |


Question
which comet has the longest orbital period?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["153P/Ikeya-Zhang"]