Talk:Great January Comet of 1910

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Photos[edit]

No photos?--Planetary 03:26, 17 August 2006 (UTC)[reply]

In 1910? Give me a break. 137.22.11.221 06:27, 26 January 2007 (UTC)[reply]

There are 1910 photos of Halley's Comet from a few months later. I'm surprised there aren't none myself.--Tim Thomason 19:32, 22 September 2007 (UTC) —Preceding unsigned comment added by Tim Thomasons Temporary Username (talk • contribs) [reply]

Photography wasn't exactly a new science by 1910. In fact i think the "Brown Betty" existed by then, And if this comet was bright enough to be seen in daytime even those could have probably captured a decent image at night. I imagine there's pictures of it in some collection somewhere in the world, they just have not been put on the internet. 82.153.230.138 (talk) 14:47, 27 November 2007 (UTC)[reply]

Lowell took several photos of this comet - one is now used in the article.Svejk74 (talk) 08:59, 22 November 2008 (UTC)[reply]

What is the "Brown Betty" anyway? —MiguelMunoz (talk) 20:15, 22 February 2013 (UTC)[reply]

What is it, indeed? Brown Betty has something, but I don't think that dessert, racehorse, flower,teapot or tv series episode could be related to photography. 91.154.188.185 (talk) 22:45, 14 September 2018 (UTC)[reply]

Aphelion distance[edit]

what's this comet's distance from the sun at aphelion in light years?99.229.166.154 22:15, 17 October 2007 (UTC)[reply]

51,590 AU is less than 1 light year. So which is wrong, 51,590 AU or 1 light year? Wecl0me12 (talk) 19:45, 16 April 2008 (UTC)[reply]

Next passage?[edit]

When will this comet return (if ever)? — Preceding unsigned comment added by 87.203.155.206 (talk) 21:17, 30 January 2009 (UTC)[reply]

q = 0.128975 [1]
e = 0.999995
$P=\left({\frac {q}{1-e}}\right)^{1.5}\approx 4$ million years.

This is a rough period of unperturbed orbit. Real previous and next perihelion passages may be very different from this value. Time interval from previous to 1910 perihelion passage and from 1910 to next perihelion passage can be several times larger or smaller from 4,000,000 years due to gravitational perturbations from the Giant planets. It is possible to estimate a time of prev. and next perihelion passages of a comet taken into account gravitational perturbations. Unfortunately, I did not found info about "original" and "future" 1/a values. — Chesnok (talk) 20:12, 31 January 2009 (UTC)[reply]

JPL's solution (using only 25 observations) has the comet returning in about 9,200 years from the last perihelion. But I would not put much weight on a long-term orbit solution with only 25 observations. The comet was probably very bright because it was shedding a lot of material near perihelion (20 million km from the Sun). -- Kheider (talk) 18:53, 6 September 2021 (UTC)[reply]

Distance from Earth[edit]

This article should mention how close it got to Earth. I think it passed very close, but I'm not sure. I remember reading that Halley's 1910 approach passed within 3 million miles of Earth, and the Great Comet of 1910 came within one million, but I'm not sure if that's true, and I don't have a reference. Does anyone know? —MiguelMunoz (talk) 20:14, 22 February 2013 (UTC)[reply]

Halley's comet passed 0.151 AU (22.6 million km) from Earth on 1910-May-20. C/1910 A1 passed 0.858 AU (128.4 million km) from Earth on 1910-Jan-18 when it was near its closest approach to the Sun. -- Kheider (talk) 18:44, 6 September 2021 (UTC)[reply]