Hubble Captures the Ghost of Cassiopeia in Near-Infrared Light
Powerful gushers of energy from seething stars can sculpt eerie-looking figures with long flowing veils of gas and dust. One striking example is "the Ghost of Cassiopeia," officially known as IC 63, located 550 light-years away in the constellation Cassiopeia the Queen.
The nebula's ethereal glow might remind people of apparitions such as those reported by paranormal investigators. In reality, when viewed in near-infrared wavelengths, streamers of dust are reflecting light from the nearby, blue-giant star Gamma Cassiopeiae (not seen here). In this near-infrared view background stars and galaxies can be seen through the semitransparent dust clouds. A blue color was assigned to shorter infrared wavelengths in one exposure. A red color was assigned to longer infrared wavelengths in a second exposure, and the images were then combined. Hubble photographed IC 63 in August 2016.
The constellation Cassiopeia is visible every clear night from mid-northern and higher latitudes. Its distinctive "W" asterism, which forms the queen's throne, is best seen high in the sky on autumn and winter evenings. Gamma Cassiopeiae, the middle star in the W, is visible to the unaided eye, but a large telescope is needed to see IC 63.
Credits
NASA, ESA, and STScIAcknowledgment: H. Arab (University of Strasbourg)
| About The Object | |
|---|---|
| Object Name | IC 63 |
| Object Description | Nebula |
| R.A. Position | 00:59:04.68 |
| Dec. Position | +60:53:42.12 |
| Constellation | Cassiopeia |
| Distance | IC 63 is located 550 light-years away from Earth. |
| Dimensions | Image is about 2.7 arcmin across (about 0.5 light-years). |
| About The Data | |
| Data Description | The HST observations include those from program H. Arab (University of Strasbourg) |
| Instrument | WFC3/IR |
| Exposure Dates | Aug 26 - 31, 2016 |
| Filters | F110W, F160W |
| About The Image | |
| Color Info | These images are a composite of separate exposures acquired by the WFC3 instrument on the Hubble Space Telescope. Several filters were used to sample narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Cyan: F110W Orange: F160W |
| 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. |
