NGC 3673 — Sb in Hydra
Sb in Hydra, 3.5 arcminutes across, its light 93 million years old. Measured by HyperLEDA, photographed by Pan-STARRS1. Recorded once.
About NGC 3673
What you are looking at
NGC 3673 is a spiral with a sizeable central bulge and well-defined arms, close in type to the Milky Way. It is tilted about 51° 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 95,000 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 99 scientific papers indexed by SIMBAD, and recorded there under 20 different catalogue designations.
When this light set out
The light that reaches us from NGC 3673 today set out about 93 million years ago, when dinosaurs were at their peak. The galaxy is moving away from us at about 1,939 km/s (4.3 million mph), carried by the expansion of the universe.
Finding it in the sky
In the sky, NGC 3673 sits within the constellation Hydra. It is best placed on spring evenings: around 9:30 pm in April it stands about 23° 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: IC 2764 (2.3° away on the sky, at least 3,690,000 light-years from it).
By apparent size it is number 342 of the 12,657 galaxies on the Galaxy Origins register.
Measurements
| Catalogue | PGC 35097 |
|---|---|
| Morphological type | Sb |
| Angular diameter | 3.53′ |
| Right ascension | 11h25m12.8s |
| Declination | -26°44′12.0″ |
| Constellation | Hydra |
| Inclination | 50.6° |
| Light travel time | 93 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 3.5 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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