Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  IC 4701  ·  IC 4715  ·  M 17  ·  M 18  ·  NGC 6603  ·  NGC 6613  ·  NGC 6618  ·  Omega nebula
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vdB114, 116, 117, 120, 121; Sagittarius, Thomas V. Davis
vdB114, 116, 117, 120, 121; Sagittarius
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vdB114, 116, 117, 120, 121; Sagittarius

Getting plate-solving status, please wait...
vdB114, 116, 117, 120, 121; Sagittarius, Thomas V. Davis
vdB114, 116, 117, 120, 121; Sagittarius
Powered byPixInsight

vdB114, 116, 117, 120, 121; Sagittarius

Equipment

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Description

vdB114, 116, 117, 120, 121; Sagittarius

Takahashi FSQ-106 f/5 refractor

KAI-11000XCM SBIG STL

Total Exposure Time: 2 hours

June 2012; Inkom, ID

Comments: This skyscape shows a region of Sagittarius that has these 5, small van den Bergh objects. They are noted with small arrows and run consecutively left to right. Because they are small, and without much interesting form, I did not shoot higher resolution images of them; the exception is vdB120. M17, the Swan Nebula, is seen in the lower right corner of the main image.

vdB114: Size (arcmin): 1.2

Type: illuminating star inside nebula

Surface brightness: faint

Color: blue

Absorption: moderate

Illuminating star ID1: BD-18 4800

Illuminating star ID2: HD165811

Mag. of illuminating star: 10.26

Spectral type of star: B8/B9Ib

vdB116: Size (arcmin): 0.6

Type: illuminating star inside nebula

Surface brightness: faint

Color: blue

Absorption: moderate

Illuminating star ID1: BD-17 5049

Illuminating star ID2: HD166288

Mag. of illuminating star: 9.86

Spectral type of star: B5Ib

vdB117: Size (arcmin): 2.2

Type: illuminating star inside nebula

Surface brightness: moderate

Color: very blue

Absorption: moderate

Illuminating star ID1: BD-17 5080

Illuminating star ID2: HD167143

Mag. of illuminating star: 9.11

Spectral type of star: B3III

vdB120: Size (arcmin): 1.2

Type: illuminating star inside nebula

Surface brightness: moderate

Color: red

Absorption: moderate

Illuminating star ID1: BD-16 4790

Illuminating star ID2: HD167746

Mag. of illuminating star: 8.69

Spectral type of star: F7II

vdB121: Size (arcmin): 0.6

Type: illuminating star inside nebula

Surface brightness: faint

Color: blue

Absorption: moderate

Illuminating star ID1: BD-17 5141

Illuminating star ID2: HD168418

Mag. of illuminating star: 9.5

Spectral type of star: B2Iab/Ib

Comments

Sky plot

Sky plot

Histogram

vdB114, 116, 117, 120, 121; Sagittarius, Thomas V. Davis