Terzan 1, Take 2

Esahubble_potw2241a_1024

esahubble_potw2241a October 10th, 2022

Credit: ESA/Hubble & NASA, R. Cohen

Terzan 1 is a globular cluster that lies about 22,000 light-years from Earth in the constellation Scorpius. It is one of 11 globular clusters that were discovered by the Turkish-Armenian astronomer Agop Terzan between 1966 and 1971 when he was working in France, based mostly at Lyon Observatory. Somewhat confusingly, the 11 Terzan globular clusters are numbered from Terzan 1 to Terzan 12. This is due to an error made by Terzan in 1971, when he rediscovered Terzan 5 — a cluster he had already discovered and reported back in 1968 — and named it Terzan 11. He published its discovery alongside those of Terzan 9, 10 and 12. He quickly realised his mistake, and attempted to have Terzan 12 renamed as Terzan 11. Unfortunately, he did not make it clear that Terzan 5 and Terzan 11 were one and the same, although another astronomer, Ivan Robert King, did publish a note to try and clear up the confusion. Nowadays, most papers recognise the original Terzan 5 and Terzan 12, and accept the oddity that there is no Terzan 11. There have, however, been instances of confusion in the scientific literature over the past few decades. Terzan 1 is not a new target for Hubble — an image of the cluster was released back in 2015, taken by Hubble’s Wide Field Planetary Camera 2 (WFPC2). That instrument was replaced by the Wide Field Camera 3 (WFC3) during the 2009 Hubble servicing mission. WFC3 has both superior resolving power and a wider field of view than WFPC2, and the improvement is obvious in this fantastically detailed image.  Links Video of Terzan 1, Take 2

Provider: Hubble Space Telescope | ESA

Image Source: https://esahubble.org/images/potw2241a/

Curator: ESA/Hubble, Baltimore, MD, United States

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Esahubble_potw2241a_128
 

Position Details

Position (ICRS)
RA = 17h 35m 47.7s
DEC = -30° 28’ 47.5”
Orientation
North is 142.5° CW
Field of View
2.4 x 1.9 arcminutes
Constellation
Scorpius

Color Mapping

  Telescope Spectral Band Wavelength
Blue Hubble (ACS) Optical (V) 606.0 nm
Red Hubble (WFC3) Infrared (H) 1.6 µm
Green Hubble (WFC3) Infrared (YJ) 1.1 µm
Spectrum_base
Blue
Red
Green
Esahubble_potw2241a_1280
×
ID
potw2241a
Subject Category
Subject Name
Credits
ESA/Hubble & NASA, R. Cohen
Release Date
2022-10-10T06:00:00
Lightyears
Redshift
Reference Url
https://esahubble.org/images/potw2241a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
ACS, WFC3, WFC3
Color Assignment
Blue, Red, Green
Band
Optical, Infrared, Infrared
Bandpass
V, H, YJ
Central Wavelength
606, 1600, 1100
Start Time
Integration Time
Dataset ID
None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
263.94877293927294, -30.479854779975728
Reference Dimension
2891.0, 2298.0
Reference Pixel
1445.5, 1149.0
Scale
-1.3888262687330658e-05, 1.3888262687330658e-05
Rotation
-142.5400000000011
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
ESA/Hubble
URL
https://esahubble.org
Name
Email
Telephone
Address
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr
City
Baltimore
State/Province
MD
Postal Code
21218
Country
United States
Rights
Creative Commons Attribution 4.0 International License
Publisher
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw2241a
Metadata Date
2022-10-06T13:24:02+02:00
Metadata Version
1.1
×

 

Detailed color mapping information coming soon...

×

There is no distance meta data in this image.