The Wide Field Camera 3 (WFC3) detector onboard Hubble was used to observe the Necklace Nebula on July 2, 2011. Hubble's WFC3 broadband filters, which show the colors of the galactic field stars, were used along with narrowband filters that show emission from the gases that make up the planetary nebula. In this composite image, ionized hydrogen gas is shown in blue, oxygen gas in green, and nitrogen gas in red. The field stars appear mainly white, with a reddish tint, which is indicative of the older population stars that make up the disk of our Milky Way galaxy.
Credits
NASA, ESA, and the Hubble Heritage Team (STScI/AURA)| About The Object | |
|---|---|
| Object Name | Necklace Nebula, PN G054.2-03.4 |
| Object Description | Planetary Nebula |
| R.A. Position | 19h 43m 59.49s |
| Dec. Position | 17° 9' 1.08" |
| Constellation | Sagitta |
| Distance | About 15,000 light-years or 4,600 parsecs |
| Dimensions | 1.7 arcminutes (7.6 light-years or 2.3 parsecs) wide |
| About The Data | |
| Data Description | This image was created from HST data from proposal : K. Noll, Z. Levay, M. Livio, C. Christian, H. Bond, L. Frattare, M. Mutchler, T. Borders, and W. Januszewski (Hubble Heritage Team/STScI). |
| Instrument | HST>WFC3/UVIS |
| Exposure Dates | July 2, 2011, Exposure Time: 44 minutes |
| Filters | F502N ([O III]), F438W (B), F656N (H-alpha), F555W (V), F658N ([N II]), and F814W (I) |
| About The Image | |
| Color Info | This image is a composite of many separate exposures made by the WFC3/UVIS instrument on the Hubble Space Telescope using six different filters, three broadband filters, and three narrowband filters. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: Blue: F502N ([O III]) + F438W (B) Green: F656N (H-alpha) + F555W (V) Red: F658N ([N II]) + F814W (I) |
| Compass Image |  |
| About The Object | |
|---|---|
| Object Name | A name or catalog number that astronomers use to identify an astronomical object. |
| Object Description | The type of astronomical object. |
| R.A. Position | Right ascension – analogous to longitude – is one component of an object's position. |
| Dec. Position | Declination – analogous to latitude – is one component of an object's position. |
| Constellation | One of 88 recognized regions of the celestial sphere in which the object appears. |
| Distance | The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs. |
| Dimensions | The physical size of the object or the apparent angle it subtends on the sky. |
| About The Data | |
| Data Description |
|
| Instrument | The science instrument used to produce the data. |
| Exposure Dates | The date(s) that the telescope made its observations and the total exposure time. |
| Filters | The camera filters that were used in the science observations. |
| About The Image | |
| Image Credit | The primary individuals and institutions responsible for the content. |
| Publication Date | The date and time the release content became public. |
| Color Info | A brief description of the methods used to convert telescope data into the color image being presented. |
| Orientation | The rotation of the image on the sky with respect to the north pole of the celestial sphere. |
