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When NGC 3892 is up, how long it stays usable and when it is in season all depend on where you observe from. Set your site and this page adds tonight's answer and its year.
The science
In one sentence
A gravitationally bound system of stars, gas and dust.
Class explainer for galaxy (catalogue type). SIMBAD files it under 'GiG' (galaxy in a group).
NGC 3892 is a galaxy in Crater. SIMBAD gives no distance for it, so its true size and light-travel time can't be worked out here. SIMBAD measures it at 1.6′ × 1.2′ on the sky — 5% of the full Moon's width. Framing uses its catalogue size instead: 3.1′. It is receding from us at about 1,788 km/s (redshift z = 0.0060). Its morphological type is SO-a. It shines at magnitude 11.2.
Sources: AstroBrain catalogue; CDS/SIMBAD astronomical database, Strasbourg (SIMBAD record NGC 3892). Contains information from SIMBAD, which is made available here under the Open Database License (ODbL). Download the SIMBAD-derived data.
Sky image
Observatory photos and open-licence sky surveys.
Credits on each image.
Sky maths: apparent positions with refraction, one-minute steps; usable = full astronomical dark, at least 30° up and clear of your skyline. Survey images: CDS, Strasbourg (DSS2 and other surveys). Science: SIMBAD. The hours, heights and Moon on this page use no weather forecast; the rank is this target’s place in the Targets list, whose score also counts the cloud forecast when there is one.