NGC 7741 — SBc in Pegasus
SBc in Pegasus, 3.6 arcminutes across, its light 36 million years old. Measured by HyperLEDA, photographed by Pan-STARRS1. Recorded once.
About NGC 7741
What you are looking at
NGC 7741 is a late-type spiral: a small central bulge and open, loosely wound arms full of young stars and star-forming gas. A bar of stars runs straight across its centre, as one does across the centre of the Milky Way. It is tilted about 50° to our line of sight, enough to show both the shape of its arms and the depth of its disc. From edge to edge its visible disc spans about 38,000 light-years (taking its redshift distance, which for a galaxy this near is approximate), about a third the width of the Milky Way.
What astronomers have recorded
SIMBAD, the reference database astronomers use, classes it as one of a pair of galaxies. It is cited in 306 scientific papers indexed by SIMBAD, and recorded there under 21 different catalogue designations.
When this light set out
The light that reaches us from NGC 7741 today set out about 36 million years ago, when the planet had come through its hottest interval since the dinosaurs. The galaxy is moving away from us at about 752 km/s (1.7 million mph), carried by the expansion of the universe. For a galaxy this close, its own motion through space is a large share of that speed, so the distance worked out from it is approximate; distances measured from individual stars in it can differ.
Finding it in the sky
In the sky, NGC 7741 sits within the constellation Pegasus. It is best placed on autumn evenings: around 9:30 pm in October it stands about 76° high in the south, seen from the middle of the United States.
Its neighbours
At almost the same distance from us, and so its neighbours in space as well as on the sky: UGC 12732 (0.7° away on the sky, at least 470,000 light-years from it); UGC 12791 (1.1° away on the sky, at least 700,000 light-years from it).
By apparent size it is number 310 of the 12,657 galaxies on the Galaxy Origins register.
Measurements
| Catalogue | PGC 72237 |
|---|---|
| Morphological type | SBc |
| Angular diameter | 3.63′ |
| Right ascension | 23h43m54.4s |
| Declination | +26°04′31.7″ |
| Constellation | Pegasus |
| Inclination | 50.1° |
| Light travel time | 36 million years |
| Bar | yes, from the catalogue |
Check every figure above in the NASA/IPAC Extragalactic Database
What is sold
A print of this galaxy and the record of the calculation, once. When it sells it leaves the register and is not offered again. We assign no names and no ownership — nobody can sell you those.
At 3.6 arcminutes this is a Exceptional galaxy, which is the tier where a real photograph shows clear structure and dust lanes. The tier comes from the measured diameter, not from a price list.
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