The Hubble Space Telescope has imaged the star field around the Cepheid variable V1 in M31. This two-color image shows individually resolved stars in the outer disk of the Andromeda Galaxy. The soft, brown swirls are dust lanes obscuring light from stars farther away from our line of sight. The blue cluster towards the upper right of the image contains massive young stars that are emanating intense ultraviolet light. The Cepheid variable, V1, the first Cepheid ever found outside of our own galaxy, is a moderate-looking star in the lower left of the image.
Credits
NASA, ESA, and the Hubble Heritage Team (STScI/AURA)| About The Object | |
|---|---|
| Object Name | M31-V1 |
| Object Description | Cepheid Variable Star V1 in M31 |
| R.A. Position | 00h 41m 26.99s |
| Dec. Position | 41° 10' 6.0" |
| Constellation | Andromeda |
| Distance | About 2.5 million light-years (0.8 megaparsecs) |
| About The Data | |
| Data Description | The image was created from Hubble data from proposal : K. Noll (PI), Z. Levay, M. Mutchler, T. Borders, L. Frattare, M. Livio, C. Christian, D. Soderblom, and H. Bond (Hubble Heritage Team/STScI). Note:The Hubble Space Telescope observations of Hubble's Variable M31-V1 were made possible from ground-based data provided by the American Association of Variable Star Observers (AAVSO). |
| Instrument | HST>WFC3/UVIS |
| Exposure Dates | December 2010 - January 2011, Exposure Time: 1.7 hours |
| Filters | F475X (Wide Blue) and F600LP (Long Pass) |
| About The Image | |
| Color Info | This image is a composite of separate exposures acquired by the WFC3 instrument on HST. Several filters were used to sample broad 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: F475X (Wide Blue) Orange: F600LP (Long Pass) |
| 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. |
