PKS 2155-304

PKS 2155-304 is a deep-sky object in the constellation Piscis Austrinus.

Blazar: a black hole's jet pointed at us, one of the brightest gamma-ray sources in the southern sky

Open it on the live sky map Plan Night Exploration

PKS 2155-304: a sky-survey photograph of its field — Sky survey view (DSS2 colour, or a backup survey)

Facts

Constellation	Piscis Austrinus
Position (J2000)	21h 58m 52s, −30° 13′

When and how to see it

PKS 2155-304 is highest in the sky at midnight in August. From India (about 20° N) it climbs to about 40° above the horizon; from 50° N, to about 10°.

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.

PKS 2155-304

Facts

When and how to see it

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