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TON 618

TON 618 is a blazar in the constellation Canes Venatici.

Quasar powered by one of the most massive black holes known

TON 618: a sky-survey photograph of its field
Sky survey view (DSS2 colour, or a backup survey)

Facts

TypeBlazar (shape ?...)
ConstellationCanes Venatici
Position (J2000)12h 28m 24s, +31° 28′
Brightnessmagnitude 15.87 (smaller is brighter; the faintest stars the eye sees are about 6)
Redshiftz = 2.2
Studied in297 scientific papers (SIMBAD)

When and how to see it

TON 618 is highest in the sky at midnight in March. From India (about 20° N) it climbs to about 79° above the horizon; from 50° N, to about 71°. To see it you need a large telescope or long-exposure photos.

Heights are worked out for India and for 50° N. Set your location in Settings to see them for where you are.

For tonight's best time from your own town, the darkness and the Moon, open it on the map and see its "Tonight from your location" card.

Everything in Canes Venatici · All 88 constellations · All sky objects

Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Data sources & credits