NGC 1145 — Sc in Eridanus
Sc in Eridanus, 3.4 arcminutes across, its light 99 million years old. Measured by HyperLEDA, photographed by Pan-STARRS1. Recorded once.
About NGC 1145
What you are looking at
NGC 1145 is a late-type spiral: a small central bulge and open, loosely wound arms full of young stars and star-forming gas. Its disc is turned almost exactly side-on to us: the galaxy appears as a narrow blade of light, and its dust as a dark seam running along it. From edge to edge its visible disc spans about 96,000 light-years, close to the width of the Milky Way.
What astronomers have recorded
SIMBAD, the reference database astronomers use, classes it as an emission-line galaxy: its spectrum shows the glow of gas lit by young stars. It is cited in 77 scientific papers indexed by SIMBAD, and recorded there under 18 different catalogue designations.
When this light set out
The light that reaches us from NGC 1145 today set out about 99 million years ago, when dinosaurs were at their peak. The galaxy is moving away from us at about 2,058 km/s (4.6 million mph), carried by the expansion of the universe.
Finding it in the sky
In the sky, NGC 1145 sits within the constellation Eridanus. It is best placed on winter evenings: around 9:30 pm in December it stands about 31° 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: NGC 1179 (1.9° away on the sky, at least 3,320,000 light-years from it); NGC 1163 (2.0° away on the sky, at least 3,480,000 light-years from it).
By apparent size it is number 395 of the 12,657 galaxies on the Galaxy Origins register.
Measurements
| Catalogue | PGC 10965 |
|---|---|
| Morphological type | Sc |
| Angular diameter | 3.36′ |
| Right ascension | 02h54m33.5s |
| Declination | -18°38′06.3″ |
| Constellation | Eridanus |
| Inclination | 83.4° |
| Light travel time | 99 million years |
| Bar | not recorded |
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 3.4 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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