Technical facts about this news release:
| About the Object |
| Object Name: |
I Zwicky 18 (I Zw 18) |
| Object Description: |
Irregular Dwarf Galaxy |
| Position (J2000): |
R.A. 09h 34m 00s.9
Dec. 55° 14' 34".2 |
| Constellation: |
Ursa Major |
| Distance: |
45 million light-years (14 Megaparsecs) |
| Dimensions: |
This image is 50 arcseconds (11,000 light-years or 3.3 kiloparsecs) wide. |
|
| About the ACS Data |
| Data Description: |
The Hubble image was created from HST data from proposal 9400: T. Thuan (Univ. of Virginia) and Y. Izotov (Main Astronomical Observatory, Kyiv, UA). |
| Instrument: |
ACS/WFC |
| Exposure Date(s): |
May 26 – June 6, 2003 |
| Exposure Time: |
19 hours |
| Filters: |
F555W (V) and F814W (I) |
|
| About the NICMOS Data |
| Data Description: |
The Hubble NICMOS data are from the following HST proposals: 7461 and 7880: G. Ostlin (Stockholm Univ.), N. Bergvall, A. Hidalgo Gamez, and K. Olofsson (Uppsala Astronomical Observatory), and J. Rönnback (Uppsala Univ.). The science team is comprised of G. Ostlin of (Stockholm Observatory) and M. Mouhcine (Univ. of Nottingham). |
| Instrument: |
NICMOS |
| Exposure Dates: |
December 28, 1997; Feb 15/22, 1998 |
| Exposure Time: |
12 hours |
| Filters: |
F110W (J), F160W (H), F205W (K), F171M (1.68-1.76 µm) and F180M (1.76-1.83 µm) |
|
| About the Image |
| Image Credit: |
NASA, ESA, Y. Izotov (MAO, Kyiv, UA) and T. Thuan (Univ. of Virginia) |
| Release Date: |
December 1, 2004 |
| Orientation: |
 |
|
