| 월호 | 분류 | 제목 | 내용 |
| 2025.04 | Going Deep | The Shakhbazian Challenge | 6개의 Shakhbazian Galaxy Group 관측 (18 and 24 inch, Bortle-2 skies and good transparency)
(These compact galaxy groups will test your observing skills and equipment.)
SHK 16 (brightest member : PGC 59049, mag(v) 14.6, size 5.2′),
SHK 166 (brightest member : PGC 59174, mag(v) 14.9, size 7.8′),
SHK 202 (brightest member : PGC 39737, mag(v) 14.6, size 9.5′),
SHK 352 (brightest member : PGC 34794, mag(v) 14.6, size 2.7′),
SHK 5 (brightest member : PGC 34447, mag(v) 17.2, size 0.7′),
SHK 1 (brightest member : PGC 32808, mag(v) 17.2, size 1.2′) |
| 2024.04 | 특집 (Leo Targets) | Exploring the Lion’s Den | 사자자리의 관측 대상 (A dozen obscure objects in Leo )
Wolf 359 (Red dwarf, high-proper-motion star), Stan’s Star (high-proper-motion dwarf star)
EGB 6 (Planetary Nebula; 사자자리 유일 PN), Frosty Leo Nebula (Pre-Planetary Nebula; 가장 밝은 pre-PN)
Leo II (Dwarf spheroidal galaxy), Leo A (a.k.a. Leo III, Dwarf spheroidal galaxy)
NGC 3501 (Flat Galaxy), UGC 5189 (Irregular Galaxy), VV 689 (Colliding Galaxies),
OGC 1559 (Super Spiral Galaxy, 12억광년), OGC 0032 (Giant Elliptical Galaxy, 18억광년)
(참고: https://www.cloudynights.com/topic/916618-a-fresh-crop-of-dsos-in-leo-and-beyond/) |
| 2024.04 | Going Deep | David Todd’s Accidental Deep-Sky Discoveries | David Todd가 해왕성 밖 행성을 찾다가 발견한 은하들 (several galaxies in Leo and Virgo)
IC 591 (Barred sp), NGC 4073 (Elliptical), NGC 4045 (Spiral), NGC 4077 (Lenticular),
NGC 4075 (Lenticular), NGC 4063 (Lenticular), NGC 4045A (Lenticular), CGCG 13-49 (Lenticular),
NGC 4139 (Lenticular), UGC 7034 (Lenticular), CGCG 13-58 (Lenticular) CGCG 13-52 (Spiral),
UGC 7057 (Spiral), PGC 38205 (Elliptical)
|
| 2023.04 | Going Deep | The Hickson Catalog’s Deep End | 4월에 관측 가능한 Hickson Compact Group 은하 도전 대상 6개
HCG 36 (IC 528), HCG 39 (UGC 5057), HCG 41 (UGC 5345),
HCG 47 (UGC 5644), HCG 49 (PGC 32899), HCG 52 (PGC 35183) |
| 2022.04 | 특집 (Cosmic Concatenation) | Markarian’s Marvelous Chain | Markarian’s Chain을 이루는 은하들 관측
M84/NGC 4374 (Elliptical), M86/NGC 4406 (Elliptical), NGC 4435 (Barred Lenticular),
NGC 4438 (Lenticular), NGC 4458 (Elliptical), NGC 4461 (Barred Lenticular),
NGC 4473 (Elliptical), NGC 4477 (Barred Lenticular), NGC 4479 (Barred Lenticular) |
| 2022.04 | Going Deep | Observing Large Quasar Groups | 사자자리의 Quasar 4개
SDSS J104520.62+141724.2, SDSS J104604.05+140241.2
SDSS J104624.25+143009.1, SDSS J104139.15+143530.2 |
| 2021.04 | 특집 (Trio in Leo) | The Lion’s Galaxy Triplet | Leo Triplet 상세 관측 (+ NGC 3593)
M65, M66, NGC 3628, NGC 3593 |
| 2020.04 | 특집 (Going Ultra-Deep) | A Curious Straight Ray | M87 Jet 관측과 스케치
(28 inch, 48 inch, 82 inch, 90 inch 관측 및 스케치)
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| 2020.04 | Deep-Sky Wonders | Sextans Uraniae | 육분의 자리 관측 대상
NGC 3115 (Galaxy), NGC 3169 (Galaxy), NGC 3166 (Galaxy), 35 Sextantis (Double star),
Rinnan’s Run (Asterism), NGC 3423 (Galaxy), Sextans B (Galaxy), Sextans A (Galaxy),
9 Sextantis (Double star), NGC 3044 (Galaxy)
|
| 2019.04 | Deep-Sky Wonders | Small-Scope Galaxies | 소구경 망원경으로 관측하는 은하 (130 mm Refractor, Semi-Rural sky)
M81 (Spiral), M82 (Non-Magellanic irregular),
M65 (Weakly barred spiral), M66 (Weakly barred spiral), NGC 3628 (Peculiar spiral),
NGC 5194 (Peculiar spiral), NGC 5195 (Non-Magellanic irregular),
M101 (Weakly barred spiral), NGC 5907 (Spiral)
|
| 2019.04 | Going Deep | Shimmering Clouds | 은하 주변의 성간 구름 (Galactic Cirrus) 관측
Galactic cirrus is challenging to observe, but follow the author’s advice and treat yourself to a special experience.
M81 - M82 영역 , M101 영역 , NGC 2903 - Regulus - Algieba 영역 ,
머리털 자리 영역 , M51 영역 , M95 - M96 - M105 영역 |
| 2018.04 | 특집 (Hydra I Cluster) | The Snake in Spring | Hydra I 은하단 관측 (19개 은하)
NGC 3309 (E3), NGC 3311 (E/S0), NGC 3308 (SAB(s)0), NGC 3307 (SB(r)0/a pec),
NGC 3312 (SA(s)b pec), PGC 31542 (SB(s)0), NGC 3316 (SB(rs)0), NGC 3314 (Sab),
PGC 31537 (SB0), PGC 31638 (SB(s)d pec), NGC 3336 (SAB(rs)c pec), NGC 3285 (SB(s)a pec),
NGC 3285B (SAB(r)b), NGC 3315 (E/S0), NGC 3305 (E0), IC 2597 (E4), PGC 31588 (Sc),
NGC 3313 (SB(r)b), NGC 3393 ((R’)SB(rs)a)
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| 2018.04 | Deep-Sky Wonders | Into the Lion’s Den | 사자 자리, 작은사자 자리 영역의 관측 대상
NGC 2964 (Spiral), NGC 2968 (Irregular), NGC 2970 (Elliptical), NGC 3003 (Spiral),
NGC 3021 (Spiral), NGC 3067 (Spiral), NGC 3245 (Lenticular), NGC 3277 (Spiral),
NGC 3254 (Spiral), NGC 3245A (Barred spiral), NGC 3158 (Elliptical), ΟΣΣ 105 (Double star)
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| 2017.04 | Deep-Sky Wonders | The Lion-Guarded Gate | 사자자리 관측 대상
M105 (Elliptical), M96 (Spiral), M95 (Barred spiral), NGC 3384 (Barred lenticular),
NGC 3389 (Spiral), NGC 3377 (Elliptical), NGC 3367 (Barred spiral), NGC 3338 (Spiral)
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| 2016.04 | Deep-Sky Wonders | A Starry Sickle | 사자 머리 부근 관측 대상. Bright stars and strange galaxies hide in Leo’s regal mane.
NGC 2903 (Spiral galaxy), γ Leo (Double star), Hickson 44 (Galaxy group),
NGC 3227 (Spiral galaxy), NGC 3226 (Elliptical galaxy), NGC 3222 (Lenticular galaxy),
NGC 3239 (Irregular galaxy), Frosty Leo (Protoplanetary)
|
| 2015.04 | 특집 (The Herschel Sprint) | William Herschel’s Extraordinary Night of Discovery | Recreating the legendary sweep of April 11, 1785 (Herschel Hustle(Herschel Sprint) 관측 대상)
허셸 남매가 1785년 4월 11일 하루밤 사이 74개의 천체를 발견한 과정에 대한 소개 |
| 2015.04 | Deep-Sky Wonders | Spring’s Hit Parade | 4~5월의 명작 관측 대상들
M81 (Spiral galaxy), M82 (Starburst galaxy), M97 (Planetary nebula), Mizar/Alcor (Double star),
Y CVn (Carbon star) , M3 (Globular cluster), Coma Star Cluster (Open cluster)
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| 2014.04 | Deep-Sky Wonders | The Last Messier | M49 근처의 추천 대상 (Galaxies and Stars in South-Central Virgo)
M49 (Galaxy), NGC 4526 (Galaxy), NGC 4535 (Galaxy), Struve 1658 (Multiple star),
NGC 4570 (Galaxy), NGC 4365 (Galaxy), NGC 4442 (Galaxy), NGC 4596 (Galaxy),
NGC 4608 (Galaxy), Porrima (Double star), Virgo Diamond (Asterism)
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| 2012.04 | Deep-Sky Wonders | Hydra’s Coils | Western Hydra hosts some remarkable galaxies and nebulae. (바다뱀 서쪽 부분 관측 대상)
Struve 1316 (Triple star), UGCA 150 (Flat galaxy), NGC 2610 (Planetary nebula),
UGCA 151 (Flat galaxy), NGC 2835 (Spiral galaxy), NGC 2784 (Lenticular galaxy),
Abell 33 (Planetary nebula)
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| 2011.04 | Deep-Sky Wonders | Sextans Uraniae | 2020.04와 동일 |
| 2010.04 | Deep-Sky Wonders | Between the Bears | 큰곰자리 북쪽의 용자리/기린자리 관측 대상
NGC 4236 (Galaxy), NGC 4125 (Galaxy), NGC 4121 (Galaxy),
RY Draconis (Carbon star), HD 106112 Group (Asterism), 32 Camelopardalis (Double star),
IC 3568 (Planetary nebula; Lemon Slice) |
| 2010.04 | 특집 (Observing Variable Galaxies) | Blazar, Blazar, Burning Bright
(Observing Variable Galaxies) | 18인치로 관측한 Blazar (BL Lacertae 천제와 optically violently variable quasar)
Markarian 421, W Comae Berenices, AP Librae, Markarian 501 (봄철 대상)
3C 371, BL Lacertae, 3C 66A, BW Tauri (봄철 이외 대상) |
| 2009.04 | Deep-Sky Wonders | The Dry Bear | 큰곰자리 대상 - Every corner of Ursa Major is chock-a-block with galaxies.
Nine Galaxies and One Double Star
NGC 2950 (Galaxy), NGC 2768 (Galaxy), NGC 2742 (Galaxy), NGC 2685 (Galaxy),
NGC 2805 (Galaxy), NGC 2814 (Galaxy), NGC 2820 (Flat Galaxy), IC 2458 (Galaxy),
Σ1321 (Double star), NGC 2681 (Galaxy)
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| 2008.04 | Deep-Sky Wonders | Bear Toes | 큰곰 자리 - 발 위치의 관측 대상 (Where the Great Bear Walks)
ν Ursae Majoris (Double star), ξ Ursae Majoris (Double star), Palomar 4 (Globular cluster),
NGC 3184 (Galaxy), NGC 3198 (Galaxy), Englemann 43 (Double star), ΟΣ 200 (Double star),
NGC 2841 (Galaxy)
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