<p>Typically it was visible a few weeks only, about 3...6 months at most. There is an excellent summary in <a href="http://adsabs.harvard.edu/full/1979JRASC..73...24B" rel="nofollow noreferrer">Broughton (1979)</a>. In 1910 the peak visibility was in April, the last recorded sighting of Halley without instrumentation on 13th June.
<a href="http://articles.adsabs.harvard.edu//full/1986JRASC..80...62Y/0000077.000.html" rel="nofollow noreferrer">Yeonan (1986)</a> gives an overview including instrumentation; while it has positional and brightness data for dates in 1911, they are for a magnitude &gt; 10, thus far beyond being visible with the naked eye.</p>
<p>So no, in 1911 Halley was not visible anymore without then bleeding-edge astronomical telescopes.</p>

CC BY-SA 4.0
2021-02-14T06:16:45.653Z
2021-02-14T06:16:45.653Z
planetmaker
<p>When Halley's Comet is visible in the sky, how long does that last? Is it only visible for a week or is it up there for a month, or several months? What I'm actually wondering is, though it arrived in 1910, could it still have been visible in the sky into 1911?</p>

<halleys-comet>
Halley's Comet duration of visibility
Dave Soroka
# Halley's Comet duration of visibility

(Asked by: username_0 on 2021-02-14)

When Halley's Comet is visible in the sky, how long does that last? Is it only visible for a week or is it up there for a month, or several months? What I'm actually wondering is, though it arrived in 1910, could it still have been visible in the sky into 1911?

**Tags:** halleys-comet

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## 1 answers

### Answer by username_1 on 2021-02-14. Score: 2

Typically it was visible a few weeks only, about 3...6 months at most. There is an excellent summary in [Broughton (1979)](http://adsabs.harvard.edu/full/1979JRASC..73...24B). In 1910 the peak visibility was in April, the last recorded sighting of Halley without instrumentation on 13th June.
[Yeonan (1986)](http://articles.adsabs.harvard.edu//full/1986JRASC..80...62Y/0000077.000.html) gives an overview including instrumentation; while it has positional and brightness data for dates in 1911, they are for a magnitude > 10, thus far beyond being visible with the naked eye.

So no, in 1911 Halley was not visible anymore without then bleeding-edge astronomical telescopes.


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