IC 4604 — Reflection Nebula in Ophiuchus
rho Oph nebula
Excellent (63/100)
Observe
1Properties
Magnitude
5.10
Angular Size
1.0° × 25.0′
rho Oph in eL neb
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Position & Identifiers
2How easy to spot?
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Medium+ | Medium+ | Medium+ |
| 150 mm Newton 150mm Newt. | Medium+ | Medium+ | Medium+ |
| Celestron C8 (203 mm SCT) C8 203mm | Medium+ | Medium+ | Medium+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Easy
on Seestar S50
3Visibility
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Best season
Apr – Jun
(peak: May)
4
Filter Response Guide
5
Eyepiece View
Explore
6
Surface Brightness
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
Rho Oph
HIP 80473; Rho Ophiuchi; 5 Ophiuchi
Easy double, sep 3.2″
Double Star
mag 5.02
0.0°
Ophiuchus
IC 4605
Reflection nebula around a bright star
Reflection Nebula
mag 4.70
2.0°
Scorpius
M80
NGC 6093
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 7.2
2.0°
Scorpius
IC 4592
Reflection nebula around a bright star
Reflection Nebula
mag 3.90
5.1°
Scorpius
V1010 Oph
Eclipsing binary, period 15.9h
Variable Star
mag 6.10
9.6°
Ophiuchus
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