Stars and deep sky
Observing target starter catalogues
Explore bright stars, historical double-star records and a selected deep-sky sample with traceable sources.
A bounded starter sample: 50 bright-star records from HEASARC BSC5P, including 23 records with identified double-star components and historical separations, plus 108 OpenNGC deep-sky records associated with Messier numbers.
These are static catalogue measurements, not current sky positions or a complete census. Double-star records may describe the same pair; a pair is not necessarily a gravitationally bound binary. Separation dates and companion position angles are not available.
Missing measurements are unknown, not zero. Sizes can come from different wavelength bands and do not guarantee an object’s visible extent. No observability or equipment-resolution prediction is made here.
158 matching records · page 5 of 7
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NGC4406
M 86
Deep sky
Recorded magnitude: 8.86 · V
Prepare a night planopenngc:NGC4406
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NGC4472
M 49
Deep sky
Recorded magnitude: 8.28 · V
Prepare a night planopenngc:NGC4472
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NGC4486
M 87
Deep sky
Recorded magnitude: 9 · V
Prepare a night planopenngc:NGC4486
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NGC4501
M 88
Deep sky
Recorded magnitude: 10.33 · V
Prepare a night planopenngc:NGC4501
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NGC4548
M 91
Deep sky
Recorded magnitude: 10.96 · V
Prepare a night planopenngc:NGC4548
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NGC4552
M 89
Deep sky
Recorded magnitude: 10.08 · V
Prepare a night planopenngc:NGC4552
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NGC4569
M 90
Deep sky
Recorded magnitude: 9.54 · V
Prepare a night planopenngc:NGC4569
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NGC4579
M 58
Deep sky
Recorded magnitude: 10.3 · V
Prepare a night planopenngc:NGC4579
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NGC4590
M 68
Deep sky
Recorded magnitude: 7.96 · V
Prepare a night planopenngc:NGC4590
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NGC4594
M 104
Deep sky
Recorded magnitude: 8.59 · V
Prepare a night planopenngc:NGC4594
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NGC4621
M 59
Deep sky
Recorded magnitude: 9.56 · V
Prepare a night planopenngc:NGC4621
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NGC4649
M 60
Deep sky
Recorded magnitude: 8.79 · V
Prepare a night planopenngc:NGC4649
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NGC4736
M 94
Deep sky
Recorded magnitude: 8.24 · V
Prepare a night planopenngc:NGC4736
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NGC4826
M 64
Deep sky
Recorded magnitude: 8.52 · V
Prepare a night planopenngc:NGC4826
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NGC5024
M 53
Deep sky
Recorded magnitude: 7.79 · V
Prepare a night planopenngc:NGC5024
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NGC5055
M 63
Deep sky
Recorded magnitude: 8.61 · V
Prepare a night planopenngc:NGC5055
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NGC5194
M 51
Deep sky
Recorded magnitude: 8.36 · V
Prepare a night planopenngc:NGC5194
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NGC5236
M 83
Deep sky
Recorded magnitude: 7.21 · V
Prepare a night planopenngc:NGC5236
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NGC5272
M 3
Deep sky
Recorded magnitude: 6.39 · V
Prepare a night planopenngc:NGC5272
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NGC5457
M 101
Deep sky
Recorded magnitude: 7.9 · V
Prepare a night planopenngc:NGC5457
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NGC5904
M 5
Deep sky
Recorded magnitude: 5.95 · V
Prepare a night planopenngc:NGC5904
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NGC6093
M 80
Deep sky
Recorded magnitude: 7.3 · V
Prepare a night planopenngc:NGC6093
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NGC6121
M 4
Deep sky
Recorded magnitude: 5.4 · V
Prepare a night planopenngc:NGC6121
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NGC6171
M 107
Deep sky
Recorded magnitude: 8.85 · V
Prepare a night planopenngc:NGC6171
Source and reuse: bsc5p
Hoffleit and Warren (1991), Bright Star Catalog, 5th revised preliminary edition; NASA/GSFC HEASARC
Original source / pinned release · NASA government-works; HEASARC free-use policy
Credit Hoffleit and Warren and NASA/GSFC HEASARC when reusing these records. Retain the source flags and historical measurement limitations.
- Selection
- Vmag <= 2.0, excluding 14 documented nonstellar HR identifiers
- Retrieved
- 2026-10-01T21:40:09.869946+00:00
- Reviewed subset SHA256
- 7fe926d80b535f9422ca81f8f3fee1d6422de29adaecfbd2f14b1a93fe5134b9
Original file hashes
- bsc5p.tdat
- e2b2f8e9d615426f9478f88061235976143d49d8b25c6c15df3f3661c7095b53
Coordinate-frame evidence
Exact source identifiers matched: 50. Evidence retrieved: 2026-10-01.
- Pinned response SHA256
- a3f83273ccaecf913a0d8e077413062c20ce1fc01ce890c80615a9572d5f1be9
Source and reuse: openngc
OpenNGC, copyright 2023 Mattia Verga; adapted by Public Universe: bounded selection and unit conversions; source row strings retained
Original source / pinned release · CC-BY-SA-4.0
OpenNGC data and adaptations retain CC BY-SA 4.0: credit the authors, indicate changes and share adaptations under the same licence. The website’s MIT software licence does not replace these data terms.
- Selection
- Nonempty Messier cross-reference; exclude duplicate M102 and double-star M040
- Retrieved
- 2026-10-01T21:40:09.873502+00:00
- Reviewed subset SHA256
- d8517e8d195ce69700645b60f8d6603d2aebba0e8e21f47603a4d6a31fe667a1
Original file hashes
- NGC.csv
- d3cd7f1ab83122e81b3453d765d93b6dbbb15c910716c9e4ff99c7e916cb2218
- addendum.csv
- 1d8f0914e643ada325a5a94d88d8fefad6a4937a2f77cc34f21483af22b11983
Coordinate-frame evidence
GAVO Data Center (author-linked OpenNGC publication) · openngc.data
Exact source identifiers matched: 107. Evidence retrieved: 2026-10-01.
Without matching frame evidence: Mel022.
- Pinned response SHA256
- bb872b3b8759508d0bf714eabcd1bfed1796be95046506dd0802819a846535dd