English Name: The Serpents
Hemisphere: Northern Hemisphere
Location: Between the constellations of Cassiopeia and Pegasus.
Visible between latitudes: +80 and -80 degrees
Best season: Summer
Seen in three seasons: Spring, Summer, & Autumn
Best seen in: July
Seen between: July and September.
Right Ascension (RA): 17 hour
Declination (DEC): +00 degrees
Area (square degrees): 637 (23rd)
Serpens (The Serpent)
- This is only uniquely constellation that is divided into two parts; Serpens Cauda (The Tail) in the left (west), and Serpens Caput (The Head) in the right (east) – they are separated by the constellation of Ophiuchus (The Serpent Holder).
- M5 – Globular Cluster; large, bright and rich, detectable with a naked-eye under good conditions in the southern part of Serpens Caput (The Head), it can be seen through binoculars appearing about half size of the Full Moon.
- M16 – Open Cluster; combined with a diffuse nebula (IC 4703, the Eagle Nebula), which adds a background – in a good conditions and large telescopes are required to see detail in the gaseous nebulosity.
Features of Interest
- NGC 6535 – Globular Cluster; faint (magnitude: +10.6), only visible with 4-inch telescopes.
- NGC 6604 – Open Cluster; small (magnitude: +6.5), readily visible with the naked-eye under very good condition.
- Unukalhai (Alpha Ser)
- Alya (Theta 1 Ser)
- Photo of the constellation; Serpens Caput / Serpens Cauda, as it appears to the naked eye. (Lines have been added for clarity.)
- Sky Chart – Serpens Caput / Serpens Cauda
- List of stars in Serpens.
Back to The 88 Constellations Lists page.