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Origin starfield with the Blue Flash Nebula NGC 6905.
Constellation Delphinus
Classic Reference: Burnham's Celestial Handbook, Robert Burnham, Jr., Volume Two, Dover Publications Inc., New York, 1978, pp. 817-832.
1 Delphini
Variable double star in Delphinus (Del)
1 Delphini is the Flamsteed designation - also known by the following identifiers:
- HD 195325 (Henry Draper catalogue)
- SAO 106172 (Smithsonian Astrophysical Observatory catalogue)
- BD+10 4303 (Bonner Durchmusterung catalogue)
- HIP 101160 (Hipparcos Satellite catalogue)
- TYC 1091-1875-1 (Tycho catalogue)
Selected data (main star):
- Visual Magnitude 6.08
- Absolute Magnitude -0.12
- Spectral Type A1e(shell)
- Color Index (B-V) -0.03
- Temperature 10516K
- Distance 565.97 ly
Additional notes on 1 Delphini
- 1 Delphini was discovered to be a double star in 1872 by S.W. Burnham using his 6" Alvan Clark refractor, and reported in the Astronomical Register (Ref. 1). He estimated the separation to be not much more than 0.5". It was listed in his catalogue of double stars (Ref. 2). As a stable emission-line shell star, 1 Delphini is important for modelling disk formation in Be stars (Ref. 3). Today, 1 Delphini is recognized as a triple visual system. Data for all three components can be found in Reference 4.
Objects I found in this field of view.
- Galaxies UGC 11568, 11569, 11571, & 11572
- Galaxies LEDA 214747 & 1382642
- Galaxies GAIA DR3 1753762041771540224 & 2MFGC 15540
- DFJ Origin-25 (Galaxy? 20h 28m 49.08s, +10° 50' 07.2")
- DFJ Origin-26 (Galaxy? 20h 29m 18.72s, +10° 47' 38.3")
References
- "New double star, 1 Delphini", S.W. Burnham, Astronomical Register, 11, pp.18-19 (1873).
- "Catalogue of 81 double stars, discovered with a 6-inch Alvan Clark Refractor", S.W. Burnham, Monthly Notices of the Royal Astronomical Society, 33, pp.351 and 6 pages of tables (1873).
- "Rates of energy gain and loss in the circumstellar envelopes of Be stars. II. 1 Delphini", C.E. Millar & J.M. Marlborough, The Astrophysical Journal, 516, pp. 280-284 (1999).
- "Spectroscopy of close visual binary components of the stable shell star 1 Delphini", Jiří Kubát, Brankica Kubátová, Barbora Doležalová, Lubomir Iliev, and Miroslav Šlechta, Astronomy & Astrophysics, 587, A22, 5 pages (2016).
Logbook
Date & Time: October 10, 2025, 7:25 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 12°C
Sunset: 6:40 pm
Moonrise: 8:30 pm
Moon Phase: Waning gibbous (81%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
2 Delphini
Variable star in Delphinus (Del)
2 Delphini is the Flamsteed designation - also known by the following identifiers:
- ε Delphini (Bayer designation)
- HD 195810 (Henry Draper catalogue)
- SAO 106230 (Smithsonian Astrophysical Observatory catalogue)
- BD+10 4321 (Bonner Durchmusterung catalogue)
- HIP 101421 (Hipparcos Satellite catalogue)
- TYC 1096-1684-1 (Tycho catalogue)
Selected data:
- Visual Magnitude 4.03
- Absolute Magnitude -2.12
- Spectral Type B6III, giant
- Color Index (B-V) -0.11
- Temperature 14000K
- Distance 330 ly
- Variable Type: Eruptive
- Magnitude Range: 3.95-4.05
- Period: Unknown
Objects I found in this field of view.
- Galaxy UGC 11587
- Galaxies LEDA 64911, 1391901, & 3091351
- Carbon star LEE 144 (TYC 1092-0551-1). These interesting stars have so much carbon convecting to their surface layers that the oxygen normally available to produce metallic oxides (eg. titanium oxide in M-class stars) is used up by the formation of carbon monoxide and dioxide. Carbon will even combine with itself to form wide C2 bands in the stellar spectra, blocking out most of the blue light and making these stars appear quite red. See Reference 1, Table 1 for LEE 144 data.
- DFJ Origin-27 (Galaxy? 20h 34m 42.10s, +11° 19' 36.1")
- DFJ Origin-28 (Galaxy? 20h 33m 18.59s, +11° 01' 28.2")
- DFJ Origin-29 (Galaxy? 20h 30m 47.46s, +11° 12' 51.7")
Reference
- "Kinematic properties of the carbon stars", Charles A. Dean, The Astronomical Journal, 81(5), pp.364-374 (1976).
Logbook
Date & Time: October 10, 2025, 8:40 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 5°C
Sunset: 6:40 pm
Moonrise: 8:30 pm
Moon Phase: Waning gibbous (81%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
3 Delphini
Variable star in Delphinus (Del)
3 Delphini is the Flamsteed designation - also known by the following identifiers:
- η Delphini (Bayer designation)
- HD 195943 (Henry Draper catalogue)
- SAO 106248 (Smithsonian Astrophysical Observatory catalogue)
- BD+12 4378 (Bonner Durchmusterung catalogue)
- HIP 101483 (Hipparcos Satellite catalogue)
- TYC 1096-1682-1 (Tycho catalogue)
Selected data:
- Visual Magnitude 5.38
- Absolute Magnitude 0.90
- Spectral Type A3IVs, subgiant
- Color Index (B-V) 0.09
- Temperature 8730K
- Distance 236 ly
- Variable Type: Eruptive
- Magnitude Range: 5.37-5.40
- Period: Unknown
Objects I found in this field of view.
- Galaxy UGC 11594
- Galaxies LEDA 1415536, 1415720, 1430248, 3091037, & 3091038
- DFJ Origin-2 (Edge-on spiral galaxy? 20h 33m 00.27s, +13° 29' 04.4")
- DFJ Origin-21 (Galaxy? 20h 35m 53.62s, +12° 51' 26.5")
- DFJ Origin-22 (Galaxy? 20h 35m 43.71s, +12° 49' 18.5")
- DFJ Origin-23 (Galaxy? 20h 35m 56.04s, +12° 58' 42.9")
- DFJ Origin-24 (Galaxy? 20h 35m 26.74s, +13° 10' 01.3")
Logbook
Date & Time: October 11, 2025, 10:09 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 10°C
Sunset: 6:38 pm
Moonrise: 9:25 pm
Moon Phase: Waning gibbous (69%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
4 Delphini
Variable double star in Delphinus (Del)
4 Delphini is the Flamsteed designation - also known by the following identifiers:
- ζ Delphini (Bayer designation)
- HD 196180 (Henry Draper catalogue)
- SAO 106274 (Smithsonian Astrophysical Observatory catalogue)
- BD+14 4353 (Bonner Durchmusterung catalogue)
- HIP 101589 (Hipparcos Satellite catalogue)
- TYC 1100-1719-1 (Tycho catalogue)
Selected data (main star):
- Visual Magnitude 4.65
- Absolute Magnitude 0.32
- Spectral Type A3V, main-sequence
- Color Index (B-V) 0.11
- Temperature 8730K
- Distance 220 ly
- Variable Type: Eruptive
- Magnitude Range: 4.64-4.69
- Period: Unknown
Objects I found in this field of view.
- Galaxies LEDA 65081, 1457243, 1467091, & 1468522
- Galaxy GAIA DR3 1810465230802398720 (GAIA1*)
- SY Delphini, LB, pulsating, long-period variable, range 10.2-12.1, period 157.34 days
- DFJ Origin-3 (Edge-on spiral galaxy? 20h 36m 31.12s, +14° 49' 53.6")
- DFJ Origin-4 (Edge-on spiral galaxy? 20h 36m 30.44s, +14° 49' 38.9")
- DFJ Origin-5 (Edge-on spiral galaxy? 20h 37m 05.38s, +14° 40' 30.5")
- DFJ Origin-6 (Galaxy? 20h 35m 08.37s, +14° 40' 42.7")
- DFJ Origin-7 (Galaxy? 20h 32m 54.12s, +14° 52' 28.3")
- DFJ Origin-8 (Galaxy? 20h 33m 24.65s, +14° 45' 01.7")
Note that GAIA1* is a cross-reference to my analysis field of view labels (not included in this website).
Logbook
Date & Time: October 23, 2025, 9:56 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 12°C
Sunset: 6:18 pm
Moonset: 6:52 pm
Moon Phase: Waxing crescent (6%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
5 Delphini
Star in Delphinus (Del)
5 Delphini is the Flamsteed designation - also known by the following identifiers:
- ι Delphini (Bayer designation)
- HD 196544 (Henry Draper catalogue)
- SAO 106322 (Smithsonian Astrophysical Observatory catalogue)
- BD+10 4339 (Bonner Durchmusterung catalogue)
- HIP 101589 (Hipparcos Satellite catalogue)
- TYC 1096-1683-1 (Tycho catalogue)
Selected data:
- Visual Magnitude 5.42
- Absolute Magnitude 1.41
- Spectral Type A2V, main-sequence
- Color Index (B-V) 0.06
- Temperature 9000K
- Distance 189 ly
Objects I found in this field of view.
- Galaxy UGC 11599
- Galaxy LEDA 1387960, 1392111
- Carbon star DO 6895 (TYC 1096-0803-1)*
- Carbon star LEE 144 (TYC 1092-0551-1)*
- DFJ Origin-9 (Galaxy? 20h 37m 24.64s, +11° 37' 37.9")
- DFJ Origin-10 (Galaxy? 20h 35m 54.12s, +11° 32' 16.2")
- DFJ Origin-11 (Galaxy? 20h 36m 19.25s, +11° 06' 08.5")
* See 2 Del, Reference 1.
Logbook
Date & Time: October 25, 2025, 7:01 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 12°C
Sunset: 6:15 pm
Moonset: 8:07 pm
Moon Phase: Waxing crescent (16%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
6 Delphini
Double star in Delphinus (Del)
6 Delphini is the Flamsteed designation - also known by the following identifiers:
- Rotanev (Proper Name)
- β Delphini (Bayer designation)
- HD 196524 (Henry Draper catalogue)
- SAO 106316 (Smithsonian Astrophysical Observatory catalogue)
- BD+14 4369 (Bonner Durchmusterung catalogue)
- HIP 101769 (Hipparcos Satellite catalogue)
- TYC 1100-1720-1 (Tycho catalogue)
Selected data (main star):
- Visual Magnitude 3.63
- Absolute Magnitude 1.04
- Spectral Type F5IV, subgiant
- Color Index (B-V) 0.45
- Temperature 6650K
- Distance 101 ly
Objects I found in this field of view.
- Galaxies LEDA 65081, 1462496
- DFJ Origin-12 (Galaxy? 20h 37m 22.67s, +14° 52' 08.8")
- DFJ Origin-13 (Spiral galaxy? 20h 36m 31.15s, +14° 49' 53.4")
- DFJ Origin-14 (Galaxy? 20h 36m 30.45s, +14° 49' 38.4")
- DFJ Origin-15 (Galaxy? 20h 37m 45.61s, +14° 22' 25.2")
Logbook
Date & Time: October 25, 2025, 8:06 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 8°C
Sunset: 6:15 pm
Moonset: 8:07 pm
Moon Phase: Waxing crescent (16%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
7 Delphini
Double star in Delphinus (Del)
7 Delphini is the Flamsteed designation - also known by the following identifiers:
- κ Delphini (Bayer designation)
- HD 196755 (Henry Draper catalogue)
- SAO 106059 (Smithsonian Astrophysical Observatory catalogue)
- BD+09 4600 (Bonner Durchmusterung catalogue)
- HIP 101916 (Hipparcos Satellite catalogue)
- TYC 1092-1776-1 (Tycho catalogue)
Selected data (main star):
- Visual Magnitude 5.07
- Absolute Magnitude 2.48
- Spectral Type G2IV, subgiant
- Color Index (B-V) 0.70
- Temperature 5790K
- Distance 98.2 ly
Objects I found in this field of view.
- Galaxies LEDA 65119, 1370157, 1375219, & 1378013
- Galaxies AGC 3000046 & UGC 11602
- DFJ Origin-16 (Galaxy? 20h 39m 45.49s, +10° 10' 24.1")
- DFJ Origin-17 (Galaxy? 20h 40m 47.93s, +10° 17' 31.6")
- DFJ Origin-18 (Galaxy? 20h 40m 30.55s, +10° 04' 32.7")
- DFJ Origin-19 (Galaxy? 20h 38m 32.21s, +09° 48' 04.5")
- DFJ Origin-20 (Galaxy? 20h 37m 32.82s, +10° 16' 17.8")
Logbook
Date & Time: October 25, 2025, 9:17 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 8°C
Sunset: 6:15 pm
Moonset: 8:07 pm
Moon Phase: Waxing crescent (16%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
8 Delphini
Star in Delphinus (Del)
8 Delphini is the Flamsteed designation - also known by the following identifiers:
- θ Delphini (Bayer designation)
- HD 196725 (Henry Draper catalogue)
- SAO 106342 (Smithsonian Astrophysical Observatory catalogue)
- BD+12 4411 (Bonner Durchmusterung catalogue)
- HIP 101882 (Hipparcos Satellite catalogue)
- TYC 1100-1721-1 (Tycho catalogue)
Selected data:
- Visual Magnitude 5.69
- Absolute Magnitude -4.01
- Spectral Type K3Ib, supergiant
- Color Index (B-V) 1.50
- Temperature 4200K
- Distance 2000 ly
Objects I found in this field of view.
- Galaxies LEDA 65083, 1422489, 1424769, 1426113, 1433622, 1434415
- AN Delphini, Mira-type variable, pulsating, range 11.40-16.20, period 194.38 days
- SN 2018efe, Supernova
- DFJ Origin-34 (Galaxy? 20h 37m 58.72s, +13° 17' 56.8")
- DFJ Origin-35 (Galaxy? 20h 38m 19.04s, +13° 17' 34.0")
- DFJ Origin-36 (Galaxy? 20h 37m 59.96s, +13° 34' 51.1")
- DFJ Origin-37 (Galaxy? 20h 37m 08.31s, +13° 33' 01.8")
- In progress ...
Logbook
Date & Time: November 2, 2025, 6:09 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 7°C
Sunset: 5:03 pm
Sunrise: 6:59 am (Nov 3)
Moonset: 3:03 am
Moon Phase: Waxing gibbous (90%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing
9 Delphini
Variable double star in Delphinus (Del)
9 Delphini is the Flamsteed designation - also known by the following identifiers:
- Sualocin (Proper Name)
- α Delphini (Bayer designation)
- HD 196867 (Henry Draper catalogue)
- SAO 106357 (Smithsonian Astrophysical Observatory catalogue)
- BD+15 4222 (Bonner Durchmusterung catalogue)
- HIP 101958 (Hipparcos Satellite catalogue)
- TYC 1633-2442-1 (Tycho catalogue)
Selected data (main star):
- Visual Magnitude 3.77
- Absolute Magnitude -1.24
- Spectral Type B9IV, subgiant
- Color Index (B-V) -0.04
- Temperature 10,600 K
- Distance 254 ly
- Variable Type: Eruptive
- Magnitude Range: 3.77-3.80
- Period: Unknown
Objects I found in this field of view.
- In progress ...
Logbook
Date & Time: November 2, 2025, 7:14 pm
Location: Kempt Shore, Nova Scotia, 45°N
Sky & Temperature: Clear, calm, 7°C
Sunset: 5:03 pm
Sunrise: 6:59 am (Nov 3)
Moonset: 3:03 am
Moon Phase: Waxing gibbous (90%)
Technical: 1-hour integration, 10-sec exposures, line power, no filter, direct wifi, no post-processing