-- under construction; read on your own risk ! --

The RASC's Deep Sky Challenge Objects list

The Royal Astronomical Society of Canada (RASC) has published this list in their yearly Observer's Handbook which is edited by Roy L. Bishop. The Deep Sky Challenge Objects List was compiled by Alan Dyer and Alister Ling; it is arranged by right ascension. Also note the RASC webpage.

Object Descriptions


No. Object       Con  Type    R.A.     Dec     m_v    Size      U #  min.A

                                                 
 1  NGC 7822     Cep  E/RN    00:03.6  +68:37   -      60x30     15  30     
 2  IC 59        Cas  E/RN    00:56.7  +61:04   -      10x5      36  20-25
 3  NGC 609      Cas  OC      01:37.2  +64:33  11.0     3.0      16  25-30
 4  IC 1795      Cas  EN      02:24.7  +61:54   -      27x13     17  20
 5  Maffei 1     Cas  G-E3    02:36.3  +59:39  ~14      5x3      38  30
 6  NGC 1049     For  GC      02:39.7  -34:29  11.0     0.6     354  25-30
 7  NGC 1275     Per  G-Pec   03:19.8  +41:31  11.6   2.6x1.9    63  20-25
 8  NGC 1432/35  Tau  RN      03:46.1  +23:47          30x30    132  10-15
 9  IC 342       Cam  G-SBc   03:46.8  +68:06  ~12     17x17     18  20-30
10  NGC 1499     Per  EN      04:00.7  +36:37         145x40     95  8-12.5 RFT
11  NGC 1554/5   Tau  RN      04:21.8  +19:32           var     133  20?
12  IC 405       Aur  E/RN    05:16.2  +34:16          30x19     97  20
13  IC 434/B 33  Ori  E/DN    05:40.9  -02:28          60x10    226  15-20 dark sky!
14  Sh 2-276     Ori  EN      05:48    +01            600x30!   226  10-15 RFT
15  Abell 12     Ori  PN      06:02.4  +09:39  ~13     37"      181  25-30
16  IC 443       Gem  SNR     06:16.9  +22:47          50x40    137  25-30
17  J 900        Gem  PN      06:25.9  +17:47  12.2     8"      137  20
18  IC 2177      Mon  E/RN    07:05.1  -10:42         120x40    273  20-30
19  PK 205+14.1  Gem  PN      07:29.0  +13:15  ~13    ~700      184  20-25
20  NGC 2419     Lyn  GC      07:38.1  +38:53  10.4     4.1     100  15-20
21  PK 164+31.1  Lyn  PN      07:57.8  +53:25  ~14    6'40"      43  25
22  Leo I        Leo  G-E3    10:08.4  +12:18   9.8   10.7x8.3  189  30
23  Abell 1367   Leo  G's     11:44.0  +19:57  13-16  ~60       147  30-40
24  NGC 3172     UMi  G-?     11:50.2  +89:07  13.6   0.7x0.7     2  25
25  NGC 4236     Dra  G-SBb   12:16.7  +69:28   9.6   18.6x6.9   25  20-25
26  Mrk 205      Dra  Quasar  12:21.6  +75:18  14.5   stellar     9  30
27  3C 273       Vir  Quasar  12:29.1  +02:03  12-13  stellar   238  25-30
28  NGC 4676     Com  G's     12:46.2  +30:44  14.1p  ~ 2x1     108  25
29  Abell 1656   Com  G's     13:00.1  +27:58  12-16  ~60       149  25-30
30  NGC 5053     Com  GC      13:16.4  +17:42   9.8    10.5     150  10-20
31  NGC 5897     Lib  GC      15:17.4  -21:01   8.6    12.6     334  15-20
32  Abell 2065   CrB  G's     15:22.7  +27:43  ~16    ~30       154  50 in superb sky!
33  NGC 6027     Ser  G's     15:59.2  +20:45  ~15    ~ 2x1     155  40
34  B 72         Oph  DN      17:23.5  -23:38          30       338  8-12.5 RFT
35  NGC 6791     Lyr  OC      19:20.7  +37:51   9.5    16       118  20-25
36  PK 64+5.1    Cyg  PN      19:34.8  +30:31   9.6     8"      118  20
37  M 1-92       Cyg  RN      19:36.3  +29:33  11.0   12"x6"    118  25-30
38  NGC 6822     Sgr  G-Irr   19:44.9  -14:48  ~11    10.2x9.5  297  10-15
39  IC 4997      Sge  PN      20:20.2  +16:45  10.9     2"      163  20
40  IC 1318      Cyg  EN      20:26.2  +40:30         large      84  8-15 RFT
41  PK 80-6.1    Cyg  PN?     21:02.3  +36:42  13.5    16"      121  25
42  IC 1396      Cep  EN      21:39.1  +57:30         170x140    57  10-12.5 RFT
43  IC 5146      Cyg  E/RN    21:53.5  +47:16          12x12     86  20-25
44  NGC 7317-20  Peg  G's     22:36.1  +33:57  13-14  ea.~1     123  25-30
45  Jones 1      Peg  PN      23:35.9  +30:28  12.1   5'32"     124  25-30

Remarks

No. Object Remarks
1 NGC 7822 large, faint emission nebula; rated `eeF'; also look for E/R nebula Ced 214 (ass. with cluster Berkeley 59) 1 deg S
2 IC 59 faint emission/reflection nebulosity paired with IC 63 close to gamma Cas; requires clean optics; rated as `pF'
3 NGC 609 faint patch at low power; high power needed to resolve this rich cluster (also look for Trumpler 1 cluster 1 deg S)
4 IC 1795 brightest part of a complex nebulosity that includes IC 1805 and IC 1848; use a nebula filter
5 Maffei 1 heavily reddened galaxy; very faint; requires large aperture and black skies; nearby Maffei II probably invisible
6 NGC 1049 Class V globular in dward `Fornax system' Local Group galaxy 630,000 ly away, galaxy itself invisible ?
7 NGC 1275 Perseus A exploding galaxy; brightest member of Abell 426 gal. cl. 300 million ly away; see Webb vol. 5
8 NGC 1432/35 Pleiades nebulosity (also includes IC 349); brightest around Merope; requires transparent sky and clean optics
9 IC 342 large and diffuse face-on spiral; member of UMa-Cam cloud (Kemble's Cascade of stars also in this chart)
10 NGC 1499 California Nebula; very large and faint; use a wide-field telescope or big binoculars plus H-Beat filter
11 NGC 1554/5 Hind's Variable Nebula; small reflect. neb. around 9m-13m var. star T Tau; use high power; difficulty varies
12 IC 405
13 IC 434/B 33
14 Sh 2-276
15 Abell 12
16 IC 443
17 J 900
18 IC 2177
19 PK 205+14.1
20 NGC 2419
21 PK 164+31.1
22 Leo I
23 Abell 1367
24 NGC 3172
25 NGC 4236
26 Mrk 205
27 3C 273
28 NGC 4676
29 Abell 1656
30 NGC 5053
31 NGC 5897
32 Abell 2065
33 NGC 6027
34 B 72
35 NGC 6791
36 PK 64+5.1
37 M 1-92
38 NGC 6822
39 IC 4997
40 IC 1318
41 PK 80-6.1
42 IC 1396
43 IC 5146
44 NGC 7317-20
45 Jones 1
  • RASC's Finest NGC Objects list
  • More Deepsky observing lists
    Hartmut Frommert (spider@seds.org).
    Christine Kronberg (smil@lrz.uni-muenchen.de)

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    Last Modification: 7 Jan 2000, 20:00 MET