NGC 6781

noirlab_noao-n6781blocks June 22nd, 2014

Credit: KPNO/NOIRLab/NSF/AURA/Adam Block

This is an almost a perfect bubble of gas cast off by a single star that has died. The bubble continues to expand; it is approximately two light years across now. Its imperfection (from our perspective) is due to photodissociation (yes... this is a real word) by interstellar UV radiation. Energetic photons from nearby bright stars decompose the gas bubble. Note the dim central blue star (a blue/white white dwarf). This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014.

Provider: NOIRLab

Image Source: https://noirlab.edu/public/images/noao-n6781blocks/

Curator: NSF's NOIRLab, Tucson, AZ, USA

Image Use Policy: Creative Commons Attribution 4.0 International License

View Options

Fullscreen

View in WorldWide Telescope

Download Options

Full Size Image (1310 x 883)
Source TIFF (1.68 MB)

Image Details

Image Type: Observation
Object Name: NGC 6781

Position Details

Position (ICRS): RA = 19h 18m 8.9s; DEC = 6° 33’ 41.4”
Orientation: North is 168.2° CCW
Field of View: 12.3 x 8.3 arcminutes
Constellation: Aquila

Color Mapping

Telescope	Spectral Band	Wavelength
KPNO-VC-0.5m (Other CCD)	Optical (Broad Band)	555.0 nm
KPNO-VC-0.5m (Other CCD)	Optical (B)	438.0 nm
KPNO-VC-0.5m (Other CCD)	Optical (G)	475.0 nm
KPNO-VC-0.5m (Other CCD)	Optical (R)	625.0 nm

ID: noao-n6781blocks
Subject Category
Subject Name: NGC 6781
Credits: KPNO/NOIRLab/NSF/AURA/Adam Block

Release Date: 2014-06-22T06:27:38
Lightyears
Redshift
Reference Url: https://noirlab.edu/public/images/noao-n6781blocks/

Type: Observation
Image Quality
Distance Notes

Facility: Visitor Center 0.5-meter Telescope, Visitor Center 0.5-meter Telescope, Visitor Center 0.5-meter Telescope, Visitor Center 0.5-meter Telescope
Instrument: Other CCD, Other CCD, Other CCD, Other CCD
Color Assignment: Luminosity, Blue, Green, Red

Band: Optical, Optical, Optical, Optical
Bandpass: Broad Band, B, G, R
Central Wavelength: 555, 438, 475, 625

Start Time
Integration Time
Dataset ID: None, None, None, None
Notes

Coordinate Frame: ICRS
Equinox: J2000
Reference Value: 289.537114008, 6.56149069246
Reference Dimension: 1310.0, 883.0

Reference Pixel: 244.818417549, 434.449714661
Scale: -0.000157085970079, 0.00015687162171
Rotation: 168.22249725566
Coordinate System Projection:: TAN

Quality: Full
FITS Header
Notes

Creator (Curator): NSF's NOIRLab
URL: https://noirlab.edu
Name
Email

Telephone
Address: 950 North Cherry Ave.
City: Tucson
State/Province: AZ

Postal Code: 85719
Country: USA
Rights: Creative Commons Attribution 4.0 International License

Publisher: NSF's NOIRLab
Publisher ID: noirlab
Resource ID: noao-n6781blocks

Resource URL: http://noirlab.edu/public/media/archives/images/original/noao-n6781blocks.tif
Related Resources

Metadata Date: 2021-09-15T15:52:45-05:00
Metadata Version: 1.1

Detailed color mapping information coming soon...

There is no distance meta data in this image.