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Home , 26 Aurigae, 65 Arietis, Alnitak, Beta Tucanae, Eta Persei, K Puppis

Cambridge University Press 978-0-521-15397-3 - Turn Left at : Hundreds of Night Sky Objects to See in a Home Telescope – And How to Find Them: Fourth Edition Guy Consolmagno and Dan M. Davis Index More information

252 Index

Altai, Rupes, 29 Bonpland (crater), 35 , Wasat, 75 altitude, 19 books, 242, 244 Delta Herculis, 121 Index Andromeda , 176 Brocchi’s Cluster, 138 Delta Orionis, , 58 Antares, 26, 45, 151 Burg (crater), 30 Deneb, 133 1 Arietis, 181 Apennines, 32 Burnham, Sherburne, 9 dew, 13, 15, 22, 65, 2 Canum Venaticorum, 113 aperture, 6, 13, 18, 20, 21, 23 Burnham 1, 188 91, 118, 162 2 , 85 aphelion, 42 BZ Crucis, 237 dew cap, 15 6 (Iota) Trianguli, 180 Apollo 11, 30, 31 diffraction spike, 23, 59; , 70 Apollo 12, 35 Callisto, 42, 47 see also spider 15 Aquilae, 141 Apollo 14, 35 Cameron (crater), 28 diffuse , 55 15 Geminorum, 73 Apollo 15, 34, 39 Caroline Herschel (crater), 35 Dione, 49 16 Cygni, 134 Apollo 17, 29, 30, 31, 37 Carpathian Mts., 35 Dobson, John, 18 24 Cancri, 93 Apollo program, 27, 30, 35 cassegrain, 18 Dobsonian, 6, 12, 18–23 24 Ophiuchi, 150 apparent field, 20, 21 Cassini division, 20, 48 dorsa, 37 26 Aurigae, 70 Apennine Mts., 32 Cassiopeia double , 188 Double Cluster, 186 32 Orionis, 58 Arago (crater), 31 Cassiopeia open double , 9, 12, 20 36 Ophiuchi, 150 arc second, 12, 20 clusters, 190 Double-double, 4, 128, 151 39 Eridani, 61 Archimedes (crater), 33, 34 , 74 Double-double’s double, 128 42 Orionis, 58 Argaeus, Mons, 29, 30 catadioptric, 5, 6, 13, DU Crucis, 237 , 212 Ariadaeus, Rima, 31, 32 15, 18, 22 Dumbbell Nebula, 99, 136 51 Pegasi, 165 Aristarchus (crater), catalogs, 8, 9, 243 Dunlop-159, 232 52 Orionis, 58 26, 29, 36–39 Catharina (crater), 29–31 53 Cnc, 97 Aristillus (crater), 32 Cauchy (crater), 29 Earthshine, 26, 28, 29 54 Leonis, 101 Aristoteles (crater), -A, 239 eclipses, 25, 40–41, 43 56 Andromedae, 180 30, 32, 33 Cepheid, 145, 177, eclipsing binaries (variables), 59 Andromedae, 180 Armstrong (crater), 31 188, 197, 227 53, 71, 183, 188 61 Cygni, 128 Arzachel (crater), 33 Chi Persei, 187 ecliptic, 26, 42, 48 Ascella, 160 Clavius (crater), 34, 35 ejecta blanket, 27 AAVSO, 242 Asperitatis, Sinus, 31 cleaning lenses, 17 Epsilon Boötis, Izar, 116 Acrux, 232 Atlas (crater), 29, 30, 65 clock drive, 19 Epsilon Canis Majoris, Albireo, 4, 129, 132 AU (), 57 Clown Face, 74 Adhara, 87 Alcor, 206 Autolycus (crater), 32 clusters, 8, 71, 115 Epsilon Hydrae, 95 Algieba, 96 averted vision, 101, Coal Sack, 237 Epsilon Lyrae, Double- , 182 123, 135 Coat Hanger, 138 double, 128 aligning Dobsonian azimuth, 18, 19, 205 Cobra’s Head (crater), 37 Epsilon Monocerotis, 77 mirrors, 16–17, 22 Cognitum, Mare, 35 Epsilon Sagittae, 139 Alkalurops, 116 Barlow, 6, 12, 22 collimation, 16–17, 22 Epsilon Volantis, 217 Almach, 180 balance telescope, 23 Collinder 399, Coat equatorial mount, 19, 203 Alnitak, 58 basin, 24, 36, 37, 31, 38, 39 Hanger, 139 Eratosthenes (crater), 34 Alpha Canis Majoris, Beehive, 9, 92, 96, 224 coma, 21–23, 93 Eta Carinae, 228 Sirius, 81 belts, 46 Comet’s Tail, 37 Eta Cassiopeiae, 188 Alpha Canis Minoris, Bessel (crater), 32 computers, 5, 49, 242, 244 Propus, 73 Procyon, 81 best seen, 9–11 , 7–9 Eta Lupi, 150 , Beta Cygni, Albireo, 132 Copernicus (crater), , 58 Kentaurus, 232 Beta Lyrae, Sheliak, 131 26, 34–39 , 186 Alpha Circini, 232 Beta Monocerotis, 78 Cordillera, 39 Euclides (crater), 35 Alpha Crucis, Acrux, 232 Beta Muscae, 232 , 10, 66 Eudoxus (crater), 30, 32, 33 Alpha Canum Venaticorum, Beta Orionis, Rigel, 58 craters, 24, 27 Europa, 47 Cor Caroli, 112 Beta Persei, Algol, 183 crescent Moon, 224, 26, 28 eyepiece, 10, 12, 20–22 Alpha Geminorum, Beta Scorpii, Graffias, 150 Crisium, Mare, 28, eyepiece power, 21 Castor, 74 , 215 30, 37, 38 eyepiece solar filters, Alpha Herculis, Ras Big Bang, 103, 109, Cygni, 120, 61 22, 23, 43 Algethi, 124 123, 197 Cyrillus (crater), 29, 31 exit pupil, 21 Alpha Scorpii, Antares, 150 binoculars, 6, 9, 13, 26, 40 Alpha Ursae Minoris, Birt (crater), 39 Danjon, André, 40 f ratio, 21, 22, 23 Polaris, 202 , 110 dark side of Moon, 26 False Cross, 208, 209, Alphonsus (crater), 33, 35 Blinking Planetary, 134 Dawes (crater), 30 222, 224, 228 Alpine Valley, 33 BM Orionis, 55 de Fontanay, Jean, 232 Fecunditatis, 28–30, 37, 38 alt-azimuth mount, 18, 19 BM Scorpii, 157 Delta Cephei, 196 festoons, 46

© in this web service Cambridge University Press www.cambridge.org Cambridge University Press 978-0-521-15397-3 - Turn Left at Orion: Hundreds of Night Sky Objects to See in a Home Telescope – And How to Find Them: Fourth Edition Guy Consolmagno and Dan M. Davis Index More information

Index 253

field of view, 6, 10–13, Heraclides, Prom., 35 KV Aquarii, 173 Galaxy, 178 19–23 Hercules (crater), 29, 30 La Superba, 112 M34, 182 filters, 11, 22, 23, 43, 242 Herodotus (crater), 36, 37 Lagoon Nebula, 146 M35, 72 finderscope, 11, 13–15, Herschel 3945, Winter , 180 M36, 68 22, 40, 43 Albireo, 86 Lambda Geminorum, 75 M37, 68 finderscope view, 11 Herschel, Caroline, 167 Lambda Orionis, , 58 M38, 68 first quarter, 32–33 crater, 35 Lamont (crater), 31 M39, 133 Flamsteed number, 9 Herschel, John, 9, 237 Lansberg (crater), 35 M41, 82 focal length, 12, 18, 20, 21 Herschel, William, 9, Langrenus (crater), 29 M42, , 52 focal point, 20, 21 54, 99, 167, 197 Large Magellanic M43, companion fogged-up lenses, 15, 65 highlands, 24, 27 Cloud, 216–221 of M42, 52 Fra Mauro (crater), 35 Hipparchos, 9, 83, 139 latitude, 7, 11, 19, 39, 90, M44, Beehive, 92 Frigoris, Mare, 30, 32–34 HJ 1123, 183 118, 121, 143, 149, M45, Pleiades, 64 full Moon, 38 HJ 2155, 183 158, 171, 205, 208 M46, 84 HN 40, 149 le Monnier (crater), 29 M47 (NGC 2422), 84 galaxy, 8, 109 HN 84, 138 lens caps, 17, 22 M49, 106 group, 109, 201; cluster, Homunculus, 229 lenses, cleaning, 17 M50, 80 supercluster, 101, 109 Horse and Rider, 207 libration, 26, 28, 32, M51, Whirlpool, 204 Galileo, 18, 43, 47, 54 Hubble, Edward, 34, 37, 39 M52, 191 Gamma Andromedae, 177, 197, 205 light , 57 M53, 110 Almach, 180 Hubble constant, 123 limb, 24 M54, 160 , Hubble Telescope, Local Group, 109, M55, 160 Mesarthim, 180 7, 143, 229 175, 177, 179, M56, 132 Gamma Crucis, Gacrux, 232 Huggins, William, 199 Longomontanus, 35 M57, Ring, 130 Gamma Delphini, 128 Humorum, Mare, 26, 37, 38 LY Aurigae, 71 M58, 107 Gamma Leonis, Algieba, 96 Hyginus (crater and M59, 107 Gamma Velorum, 222 rille), 27, 32 M1, Crab Nebula, 66 M60, 107 Gamma Virginis, M2, 166 M62, 154 Porrima, 104 I 2391, 223 M3, 114 M63, 113 Gamma Volantis, 217 Iapetus, 49 M4, 152 M64, Black Eye, 110 Ganymede, 47 IC 2602, Southern M5, 124 M65, 100 Gassendi (crater), 37 Pleiades, 228 M6, 156 M66, 100 Gem, 228 Imbrium, Mare, 26, 34–39 M7, 156 M67, 94 Ghost of Jupiter, 98 Internet, 5, 242 M8, Lagoon, 146 M71, 138 giant impact, 27 Io, 47 M10, 126 M72, 168 gibbous Moon, 34–37 Iota Boötis, 206 M11, Wild Ducks, 140 M79, 62 globular cluster, 8, 115 Iota Cancri, 96 M12, 126 M80, 152 Graffias, 152 Iota Cassiopeiae, 188 M13, Great Globular, 120 M81, 200 Great Globular Cluster, 120 , 54 M15, 164 M82, 200 Great Red Spot, 46 Iota (6) Trianguli, 180 M16, 142 M84, 107 greatest elongation, 42 Iridum, Sinus, 35 M17, Swan, 142 M86, 107 Grimaldi (crater), 26, 38, 39 Izar, 116 M18, 142 M87, 107 guideposts, 7 M19, 154 M88, 107 J Velorum, 229 M20, Trifid, 148 M89, 107 h Persei, 187 Jansen (crater), 31 M21, 148 M90, 107 h 3752, 62 Jewel Box, 236 M22, 158 M91, 107 h 4128, 225 Jupiter, 46 M23, 144 M92, 122 h 4432, 229 Jurn Mts., 35 M24, 145 M93, 88 Hadley Rille, 34, 39 M25, 144 M94, 112 Haemus, Montes, 32 k Puppis, 89 M26, 141 M95, 102 half Moon, 32–33 Kappa Boötis, 206 M27, Dumbbell, 136 M96, 102 Halley, Edmund, 239 , 75 M28, 158 M98, 108 Hamburger Galaxy, 239 Kappa Leonis, 96 M29, 133 M99, 108 Harbinger Mons, 36 Kappa Tucanae, 215 M30, 170 M101, Pinwheel, 206 harvest Moon, 39, 163 Kayuga (spacecraft), 37 M31, Andromeda M103, 194 HD 160202, 157 Kepler (crater), 26, 36–39 Galaxy, 176 M105, 102 HdO 290, 240 Keyhole Nebula, 228 M32, companion of M110 (NGC 205), Heis (crater), 35 Kuiper (crater), 35 M31, 176 with M31, 176 Helix Nebula, 172 Kuiper Belt, 117 M33, Triangulum magazines, 43–49, 242–245

© in this web service Cambridge University Press www.cambridge.org Cambridge University Press 978-0-521-15397-3 - Turn Left at Orion: Hundreds of Night Sky Objects to See in a Home Telescope – And How to Find Them: Fourth Edition Guy Consolmagno and Dan M. Davis Index More information

254 Index Magellanic Clouds, 210–221 NGC 225, 192 NGC 1966, 216 NGC 3608, 101 Maginus (crater), 35 NGC 231, 210 NGC 1967, 216 NGC 3628, 100 magnification, 10, 12, NGC 247, 174 NGC 1968, 216 NGC 3632, 101 18, 20–21; NGC 249, 210 NGC 1974, 216 NGC 3766, Pearl, 228 maximum useful, 20–21 NGC 253, 174 NGC 1980, 53 NGC 4216, 108 minimum useful, 21 NGC 261, 210 NGC 1981, 53 NGC 4372, 234 magnitude, 7 NGC 265, 210 NGC 1983, 216 NGC 4435, 107 Maksutov, 18 NGC 281, Pacman, 189 NGC 1984, 216 NGC 4438, 107 Manilius (crater), 32 NGC 288, 174 NGC 1986, 216 NGC 4461, 107 Manners (crater), 31 NGC 330, 210 NGC 1994, 216 NGC 4469, 106 mare, 24, 27 NGC 346, 210 NGC 2001, 216 NGC 4473, 107 Marginus, Mare, 28 NGC 362, 214 NGC 2009, 216 NGC 4477, 107 Marius (crater), 36, 37 NGC 371, 210 NGC 2014, 216 NGC 4526, 106 Mars, 44–45 NGC 376, 210 NGC 2015, 216 NGC 4535, 106 Maskelyne (crater), 31 NGC 395, 210 NGC 2031, 216 NGC 4638, 107 Maskelyne G (crater), 31 NGC 419, 210 NGC 2032, 216 NGC 4754, 105 Menelaus (crater), 32, 38 NGC 436, 193 NGC 2033, 216 NGC 4755, Jewel Box, 236 Mercury, 42, 43, 47, 151 NGC 456, 210 NGC 2035, 216 NGC 4762, 105 Mesarthim, 180 NGC 457, 193 NGC 2042, 216 NGC 4833, 234 Messier (crater), 29, 37 NGC 458, 210 NGC 2044, 216 NGC 4945, 238 Messier-A (crater), 29, 37 NGC 460, 210 NGC 2048, 216 NGC 5128, 239 Messier Catalog, 9, 67 NGC 465, 210 NGC 2055, 216 NGC 5139, Omega Messier, Charles, 9, 18, 67, NGC 604 in M33, 179 NGC 2060, 216 Centauri, 238 85, 143, 167, 205 NGC 637, 195 NGC 2070, Tarantula, 216 NGC 5189, Spiral Messier marathon, 171 NGC 654, 195 NGC 2074, 216 Planetary, 234 , 8, 63, 73, NGC 659, 195 NGC 2077, 216 NGC 5195 companion 90, 109, 118, 133, NGC 663, 195 NGC 2079, 216 of M51, 204 142–149, 155, 159, NGC 752, 178 NGC 2080, 216 NGC 5286, 239 183, 228–231, 237; NGC 869, Double NGC 2081, 216 NGC 6207, 121 see also Local Group Cluster, 186 NGC 2086, 216 NGC 6530, 146 Mintaka, 58 NGC 884, Double NGC 2098, 216 NGC 6543, Cat’s Eye, 198 Mirfak, 182 Cluster, 186 NGC 2100, 216 NGC 6744, 240 Mirzam, 83 NGC 1535, 60 NGC 2103, 216 NGC 6752, 240 Mizar, 10, 206, 232 NGC 1711, 216 NGC 2122, 216 NGC 6826, Blinking, 134 Moltke (crater), 31 NGC 1727, 216 NGC 2129, 73 NGC 7009, Saturn, 168 Moon, 24–41 NGC 1743, 216 NGC 2158, 73 NGC 7293, Helix, 172 Mortis, Lacus, 30 NGC 1755, 216 NGC 2232, 78 NGC 7789, 191 Mu Boötes, Alkaurops, 116 NGC 1786, 216 NGC 2244, 76 North Star, 202 Mu Canis Majoris, 81 NGC 1835, 216 NGC 2362, 86 Nu Scorpii, 150 Mu Cephei, Garnet Star, 196 NGC 1837, 216 NGC 2392, Clown Face, 74 Nubium, Mare, 26, 33, 38-39 Mu Crucis, 232 NGC 1845, 216 NGC 2414, 85 mutual events, 47, 48 NGC 1847, 216 NGC 2423, 85 objective, 18, 20–22, 43 NGC 1850, 216 NGC 2438, 85 , 26, 40, 48 N Centauri, 239 NGC 1854, 216 NGC 2516, 224 Omega Aurigae, 70 naked-eye charts, 11 NGC 1856, 216 NGC 2547, 222 , 238 nebula filter, 55, 99; NGC 1858, 216 NGC 2808, 226 Omicron Ophiuchi, 150 see also filters NGC 1872, 216 NGC 2976, 201 Omicron-2 Eridani, Keid, 60 Nectaris, Mare, 26, NGC 1874, 216 NGC 3077, 201 , 8, 71 29–31, 35, 38 NGC 1876, 216 NGC 3114, 227 opera glasses, 13 Neptune, 18, 49, 61, 117 NGC 1877, 216 NGC 3242, Ghost opposition, 44, 45, 48 New General Catalog, 9 NGC 1901, 216 of Jupiter, 98 optical double, 233 New Moon, 26 NGC 1907, 71 NGC 3293, Gem, 228 Orientale Basin, 39 Newtonian, 11, 13, NGC 1910, 216 NGC 3372, Keyhole, 228 Orion Nebula, 52 15, 18–23, 205 NGC 1934, 216 NGC 3384, 102 Otto Struve 44, 183 NGC 104, 47 Tucanae, 212 NGC 1935, 216 NGC 3389, 102 Otto Struve 525, 131 NGC 129, 193 NGC 1936, 216 NGC 3412, 102 NGC 188, 202 NGC 1955, 216 NGC 3532, Wishing Pacman Nebula, 189 NGC 220, 210 NGC 1962, 216 Well, 228 Palus Putredinis, 34 NGC 222, 210 NGC 1965, 216 NGC 3607, 101 Parry (crater), 35

© in this web service Cambridge University Press www.cambridge.org Cambridge University Press 978-0-521-15397-3 - Turn Left at Orion: Hundreds of Night Sky Objects to See in a Home Telescope – And How to Find Them: Fourth Edition Guy Consolmagno and Dan M. Davis Index More information

Index 255 Pearl, 229 Rigel, 58 Struve 153, 195 Tranquillitatis, Mare, penumbral, 40–41 rilles, 27 Struve 163, 188 26, 29–32, 37, 38 Peirce (crater), 28 Ring Nebula, 130 Struve 742, 66 Tranquility base, 31 Petavius (crater), 29 rings, 48 Struve 745, 54 transits, 43 phases, 24–26, 42–43 Riphaeus Mts., 35 Struve 747, 54 Trapezium, 52–55 Phi-2 Cancri, 96 Ritter (crater), 31, 32 Struve 761, 56 Triangulum Galaxy, 8, 178 Pi Boötis, 116 Rook Mts., 39 Struve 1083, 75 Triesnecker (crater and Picard (crater), 28 Rosette, 76 Struve 1108, 75 dorsa), 32–33 Pickering, see Messier-A Ross (crater), 31 Struve 1266, 96 Trifid Nebula, 148 Pico (crater), 35 Rosse, Lord (William Struve 1685, 110 twinkle, 45 Pinwheel Galaxy, 206 Parsons), 205 Struve 1689, 105 Tycho, 26, 27, 32, 35, 37, 38 planetary nebulae 8, 9, 99 RR Lyrae, Struve 1702, 113 planets, 42–49 RR Scorpii, 155 Struve 1795, 206 U Sagittarii, 145 Plato (crater), 33 Rumker 8, 225 Struve 1999, 150 UFO, 42 Pleiades, 64 RZ Cassiopeiae, 188 Struve 2391, 141 umbral, 40–41 Plinius (crater), 30 Struve 2470, D-D’s Upsilon Andromedae, 181 Pluto, 49 Sabine (crater), 31, 32 double, 128 Upsilon Carinae, 227 Polaris, 7, 19, 202 Saturn, 48 Struve 2474, D-D’s Uranus, 49 poles, 26–27, 46 Saturn Nebula, 168 double, 128 Ursa Major Group, 207 Posidonius (crater), Schmidt–Cassegrain, 18 Struve 2725, 128 29, 30, 32 Schröter effect, 43 Struve 2815, 197 V Aquilae, 141 prime focus, 18 Schröter’s Valley, 36, 37 Struve 2816, 196 V1016 Orionis, 55 Prinz (crater), 36 Secchi, Angelo, 113 Struve 2819, 196 Vaporum, Mare, 32–34 Procellarum, Oceanus, Serenitatis, Mare, 26, Struve 3053, 188 , 8–9, 196 24–26, 36–40 29–33, 37, 38 Struve, Friedrich, 9 Venus, 42–43 Proclus (crater), 38 Seven Sisters, see Pleiades Struve, Otto, 9 Vulcan, 61 Procyon, 81 SETI, 61 SU Cassiopeiae, 188 VZ Cancri, 94 projection, 43 Sheliak, 131 Summer Triangle, 91, 118 , 232 Schiller (crater), 37 , 43 waning Moon, 39 Psi Draconis, 199 Sidus Ludovicianum, 207 sunspots, 43 What you’re looking at, 8–9 Ptolemaeus (crater), 33 Sigma Cassiopeiae, 188 superclusters, 103, 109 What, where and when pulsar, 67 Sigma Corona Borealis, 121 supernova, 8, 71, 115, to look, 7, 256 Puzzle, 206 , 56 190, 213, 228, 229 Whirlpool Galaxy, 109, 204 Sinus Medii, 33 supernova remnant, white dwarfs, 61 , 239 Sirius, 81 8, 66, 217 Wild Ducks, 140 sky conditions, 10 Swan Nebula, 8, 142 Winter Albireo, 86 R Cygni, 135 , 210 Syrtis Major, 44 Wishing Well, 228 R Scuti, 141 Smirnov, Dorsa, 29 Wolf-Rayet stars, 223 Ranger 7, 35 Smythii, Mare, 28 T-Tauri stars, 147 Ranger 9, 35 Somniorum, Lacus, 30 Tables, 244–249 X-rays 165, 197 Ras Algethi, 124 Southern Highlands, 29–38 , 216–222 Xi Boötis, 116 rating, 9–10 Southern Pleiades, 231 Taruntius (crater), 28 Xi Lupi, 150 rays, 26, 27, 29, 36–38 spectral class, 55, 65, 71 Tau Canis Majoris, 86 Xi Pavondi, 240 , 71 spectroscopic binary, Taurus–Littrow, lunar Xi Scorpii, 150 reflector, 17, 18, 20–21 135, 180, 203, 232 valley, 29 refractor, 6, 15, 18, spider, 17, 23 telescope view, 11–12, 244 Y Canum Venaticorum, 20, 21, 23 Spiral Planetary, 234 Telrad, 22 La Superba, 113 Regulus, 97 Stadius (crater), 34 Teneriffe Mts., 33 Zeta Cancri, Tegmine, 92 Reiner (crater), 36 standard candle, 197 terminator, 24, 25 Zeta Corona Borealis, 116 Reinhold (crater), 35 star diagonal, 6, 13, 22, 23 Tethys, 49 Zeta Lyrae, 128 resolution, 20–21 Star of Bethlehem, 42 Tharsis, 44 Zeta Orionis, Alnitak, 58 Rey, H. A., 7, 242 star parties, 205, 244 Theophilus (crater), 29, 31 Zeta Sagittae, 139 Rhaeticus (crater), 33 Star Trek, 61 Theta Sagittae, 139 Zeta Sagittarii, Ascella, 161 Rhea, 49 starburst , 175 Theta-1 Orionis Zeta Ursae Majoris, Rho Cassiopeiae, 190 , 147, 223 Trapezium, 55 Mizar, 206 Rho Herculis, 123 storing the telescope, 16–17 Theta-2 Orionis, 55 Zeta Volantis, 217 , 183 Straight Wall, 33, 39 Thuban, 203 zodiac, 26, 46, 50 Richaud, Jean, 232 Struve 118, 66 Titan, 49 zones, 46 Rigel Kentaurus, 232 Struve 131, 194 Toricelli (crater), 31 ZZ Carinae, 227

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