NGC 4754 — S0 in Virgo
S0 in Virgo, 4.2 arcminutes across, its light 63 million years old. Measured by HyperLEDA, photographed by Pan-STARRS1. Recorded once.
About NGC 4754
What you are looking at
NGC 4754 is a lenticular galaxy: a disc galaxy that has largely used up the gas it needs to form new stars, so its disc is smooth and has no spiral arms. We see it almost exactly edge-on, so its whole disc appears as one thin band of light, with dust showing as a dark line along its length. From edge to edge its visible disc spans about 76,000 light-years (taking its redshift distance, which for a galaxy this near is approximate), about 78% of the Milky Way’s width.
What astronomers have recorded
SIMBAD, the reference database astronomers use, classes it as one of a pair of galaxies. It is cited in 299 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 4754 today set out about 63 million years ago, when an asteroid had ended the age of dinosaurs. The galaxy is moving away from us at about 1,317 km/s (2.9 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
NGC 4754 lies in Virgo. It is best placed on spring evenings: around 9:30 pm in May it stands about 61° high in the south, seen from the middle of the United States.
Its neighbours
It lies in the direction of the Virgo Cluster and at a matching speed, which places it among the cluster’s more than a thousand galaxies, the nearest large cluster to the Milky Way. At almost the same distance from us, and so its neighbours in space as well as on the sky: NGC 4762 (0.2° away on the sky, at least 200,000 light-years from it); NGC 4694 (1.0° away on the sky, at least 1,150,000 light-years from it); IC 3727 (1.8° away on the sky, at least 2,000,000 light-years from it); UGC 8032 (2.0° away on the sky, at least 2,220,000 light-years from it), and 9 more.
By apparent size it is number 215 of the 12,657 galaxies on the Galaxy Origins register.
Measurements
| Catalogue | PGC 43656 |
|---|---|
| Morphological type | S0 |
| Angular diameter | 4.16′ |
| Right ascension | 12h52m17.5s |
| Declination | +11°18′50.2″ |
| Constellation | Virgo |
| Inclination | 90.0° |
| Light travel time | 63 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 4.2 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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