Hidden Treasures

Stephen James O'Meara's 109 finest deep-sky objects left out of both the Messier and Caldwell lists.

14% complete 94 to go 9 sessions 12 constellations first 2024-01-07 · latest 2026-07-24

✦Open Clusters

13/38

◍Galaxies

1/35

◎Planetary Nebulae

0/14

☁Nebulae

0/9

●Globular Clusters

0/8

✧Asterisms

1/4

★Other

0/1

All 109

observed not yet manual check-off

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109

✦ Open Clusters 13 of 38

#		Object	Type	Constellation	Mag	Logged
H1		NGC 189	open cluster	Cassiopeia	8.8	—
H2		NGC 225	open cluster	Cassiopeia	7	—
H7		NGC 659	open cluster	Cassiopeia	7.9	—
H14	✓	Col 39Alpha Persei Cluster	open cluster	Perseus	2.3	2024-01-16 as Col 39
H23		NGC 1502Part of Kemble's Cascade	open cluster	Camelopardalis	6	—
H25		NGC 1528	open cluster	Perseus	6.4	—
H26		NGC 1545	open cluster	Perseus	6.2	—
H27	✓	NGC 1647	open cluster	Taurus	6.4	2024-01-07 as NGC 1647
H29		Col 69Orion Cluster / Lambda Orionis Cluster	open cluster	Orion	3	—
H30		NGC 1981Upper Sword	open cluster	Orion	4.2	—
H31		Col 72Lower Sword	open cluster	Orion	3	—
H36	✓	NGC 216937 Cluster	open cluster	Orion	5.9	2024-01-10 as NGC 2169
H38	✓	NGC 2264Christmas Tree cluster / Cone nebula	open cluster	Monoceros	4.1	2025-12-27 as NGC 2264
H39		NGC 2301	open cluster	Monoceros	6	—
H40		NGC 2353	open cluster	Monoceros	7.1	—
H44		NGC 2547	open cluster	Vela	4.7	—
H45		NGC 2539	open cluster	Puppis	6.5	—
H46		NGC 2546	open cluster	Puppis	6.3	—
H50		IC 2488	open cluster	Vela	6	—
H53		NGC 3228	open cluster	Vela	6	—
H54		NGC 3293	open cluster	Carina	4.7	—
H62	✓	Col 256Coma Star Cluster	open cluster	Coma Berenices	1.6	2024-05-03 as Col 256
H71		NGC 5281	open cluster	Centaurus	5.9	—
H73		NGC 5662	open cluster	Centaurus	5.5	—
H79		NGC 6242	open cluster	Scorpius	6.4	—
H80		NGC 6281	open cluster	Scorpius	5.4	—
H82		NGC 6400	open cluster	Scorpius	8.8	—
H83	✓	IC 4665	open cluster	Ophiuchus	4.7	2025-07-01 as IC 4665
H88		NGC 6520	open cluster	Sagittarius	7.6	—
H92	✓	NGC 6633	open cluster	Ophiuchus	4.6	2026-07-21 as Ta2 166 2026-07-24 as NGC 6633
H93	✓	IC 4756	open cluster	Serpens	4.3	2026-07-21 as Ta2 169 2026-07-24 as IC 4756
H94	✓	NGC 6709	open cluster	Aquila	6.7	2026-07-24 as NGC 6709
H98	✓	NGC 6819	open cluster	Cygnus	7.3	2026-07-24 as NGC 6819
H100	✓	NGC 6866	open cluster	Cygnus	7.6	2026-07-24 as NGC 6866
H101	✓	NGC 6940	open cluster	Vulpecula	6.3	2026-07-24 as NGC 6940
H105		Col 439Elephant's Trunk Nebula	open cluster	Cepheus	3.8	—
H106		NGC 7380	open cluster	Cepheus	7.2	—
H108	✓	NGC 7789Caroline's Rose Cluster	open cluster	Cassiopeia	6.7	2026-07-24 as NGC 7789

◍ Galaxies 1 of 35

#		Object	Type	Constellation	Mag	Logged
H5		NGC 404	spiral galaxy	Andromeda	10	—
H6		NGC 584	spiral galaxy	Cetus	10.5	—
H8		NGC 772	spiral galaxy	Aries	10.3	—
H9		NGC 908	spiral galaxy	Cetus	10.2	—
H10		NGC 1023The Perseus Lenticular	spiral galaxy	Perseus	9.5	—
H11		NGC 1232	spiral galaxy	Eridanus	9.8	—
H12		NGC 1291	spiral galaxy	Eridanus	8.5	—
H13		NGC 1316Radio Galaxy Fornax A	spiral galaxy	Fornax	8.2	—
H17		NGC 1365The Fornax Barred Spiral	spiral galaxy	Fornax	9.5	—
H18		NGC 1399	elliptical galaxy	Fornax	9.4	—
H19		NGC 1398	spiral galaxy	Fornax	9.5	—
H20		NGC 1404	elliptical galaxy	Fornax	10	—
H47		NGC 2683	spiral galaxy	Lynx	9.7	—
H48		NGC 2655	spiral galaxy	Camelopardalis	10.1	—
H49		NGC 2841	spiral galaxy	Ursa Major	9.3	—
H51		NGC 2903	spiral galaxy	Leo	8.8	—
H52		NGC 3184	spiral galaxy	Ursa Major	9.6	—
H55		NGC 3344	spiral galaxy	Leo Minor	9.7	—
H56		NGC 3521	spiral galaxy	Leo	9.2	—
H57		NGC 3621	spiral galaxy	Hydra	9.4	—
H58		NGC 3628The Wobbly Edge-On Galaxy	spiral galaxy	Leo	9.6	—
H59		NGC 4214	irregular galaxy	Canes Venatici	9.6	—
H60		NGC 4216	spiral galaxy	Virgo	10.3	—
H63		NGC 4490	spiral galaxy	Canes Venatici	9.5	—
H65		NGC 4526	spiral galaxy	Virgo	9.6	—
H66		NGC 4605	spiral galaxy	Ursa Major	10.1	—
H67		NGC 4656The Hockey Stick Galaxy	spiral galaxy	Canes Venatici	10.1	—
H68		NGC 4699	spiral galaxy	Virgo	9.6	—
H69		NGC 4725	spiral galaxy	Coma Berenices	9.3	—
H70		NGC 5102	spiral galaxy	Centaurus	9.5	—
H72		NGC 5363	spiral galaxy	Virgo	10.5	—
H74		NGC 5746	spiral galaxy	Virgo	10.5	—
H75	✓	NGC 5866Spindle Galaxy	spiral galaxy	Draco	9.9	2026-03-19 as M 102
H85		NGC 6503	spiral galaxy	Draco	10.2	—
H109		NGC 7793	spiral galaxy	Sculptor	9	—

◎ Planetary Nebulae 0 of 14

#	Object	Type	Constellation	Mag	Logged
H16	NGC 1360	planetary nebula	Fornax	9.4	—
H22	NGC 1501	planetary nebula	Camelopardalis	11.5	—
H24	NGC 1535	planetary nebula	Eridanus	9.6	—
H28	IC 418	planetary nebula	Lepus	9.1	—
H41	NGC 2440	planetary nebula	Puppis	9.4	—
H61	NGC 4361	planetary nebula	Corvus	10.9	—
H64	IC 3568	planetary nebula	Camelopardalis	10.3	—
H78	NGC 6210	planetary nebula	Hercules	8.8	—
H81	NGC 6369	planetary nebula	Ophiuchus	11.4	—
H84	NGC 6445Little Gem	planetary nebula	Sagittarius	11.2	—
H90	NGC 6572The Emerald	planetary nebula	Ophiuchus	8.1	—
H99	NGC 6818	planetary nebula	Sagittarius	9.3	—
H103	NGC 7008	planetary nebula	Cygnus	10.7	—
H104	NGC 7027	planetary nebula	Cygnus	8.5	—

☁ Nebulae 0 of 9

#	Object	Type	Constellation	Mag	Logged
H3	NGC 281	bright nebula	Cassiopeia	7.8	—
H15	NGC 1333	bright nebula	Perseus	5.7	—
H32	NGC 1977	bright nebula	Orion	6.3	—
H33	NGC 1999	bright nebula	Orion	9.5	—
H34	NGC 2024The Flame Nebula	bright nebula	Orion	7.2	—
H35	NGC 2163	bright nebula	Orion	11	—
H37	NGC 2175	bright nebula	Orion	6.9	—
H43	NGC 2467	bright nebula	Puppis	7.1	—
H102	Northern Coalsack	dark nebula	Cygnus	—	manual

● Globular Clusters 0 of 8

#	Object	Type	Constellation	Mag	Logged
H4	NGC 288	globular cluster	Sculptor	8.1	—
H76	NGC 5897	globular cluster	Libra	8.4	—
H77	NGC 5986	globular cluster	Lupus	7.6	—
H86	NGC 6441	globular cluster	Scorpius	7.2	—
H89	NGC 6544	globular cluster	Sagittarius	7.5	—
H91	NGC 6624	globular cluster	Sagittarius	7.6	—
H95	NGC 6712	globular cluster	Scutum	8.1	—
H96	NGC 6723	globular cluster	Sagittarius	6.8	—

✧ Asterisms 1 of 4

#		Object	Type	Constellation	Mag	Logged
H21		SaA 17Kemble's Cascade	asterism	Camelopardalis	—	—
H42		NGC 2451	asterism	Puppis	2.8	—
H97	✓	Col 3994-5 Vul. / Al Sufi's Cluster, Brocchi's Cluster, Coathanger	asterism	Vulpecula	3.5	2026-07-24 as Col 399
H107		O'Meara 1	asterism		—	manual

★ Other 0 of 1

#		Object	Type	Constellation	Mag	Logged
H87		Barnard's Star	star		9.5	manual

Generated 2026-07-24 22:44 from a PiFinder observation log and hidden_treasures.pifinder. Matching is designation-aware — a treasure counts when a log entry resolves to the same object, so NGC 5866 is credited to a log of M 102. 3 of the 109 entries (H87 Barnard's Star, H102 Northern Coalsack, H107 O'Meara 1) carry coordinates rather than a catalog designation and can never match automatically; they are shown as manual check-offs.