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NGC 1691 — Galaxy in Orion

Galaxy Fair (24/100)

Lenticular

Magnitude 13.0m Galaxy Orion (Ori) Visible
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1Properties

Magnitude 13.0
Angular Size 1.5′ × 1.5′
Position Angle 30°
Distance 214.89 million ly
Galaxy Type Lenticular (S0-a)
F, S, *11 inv

Position & Identifiers

RA 04h 54m 38.4s
Dec +03° 16' 04.8"
Constellation Orion (Ori)
Catalog NGC 1691

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. V. hard+ V. hard+ V. hard
150mm Newt. Hard+ Hard Hard
C8 203mm Medium Hard+ Hard
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

Medium on Seestar S50

3Visibility

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Best season Oct – Dec (peak: Nov)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 1691 · 1.5′×1.5′ · N up, E left

5 Best Magnification

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6 Surface Brightness

7 Morphology Decoder

8 Inclination & True Shape

9 Redshift

10 Size Comparator

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11

Light Travel Time Machine

12

Relativistic Travel

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