Biela's Comet

3D/Biela

Biela's Comet in February 1846, soon after it split into two pieces
Discovery
Discovered by	Wilhelm von Biela
Discovery date	February 27, 1826
Designations
Alternative designations	1772; 1806 I; 1832 III; 1846 II; 1852 III; 1772 E1; 1826 D1; 1832 S1
Orbital characteristics [1] [2]
Epoch	September 29, 1852
Aphelion	6.190 AU
Perihelion	0.8606 AU
Semi-major axis	3.5253 AU
Eccentricity	0.7559
Orbital period	6.619 yr
Inclination	12.550°
Last perihelion	September 23, 1852 (fragment A) [2] September 24, 1852 (fragment B) [2]
Next perihelion	Last seen September 1852
TJupiter	2.531
Earth MOID	0.0005 AU (75 thousand km) (epoch 1832) [3]
Physical characteristics
Dimensions	≈0.5 km (pre-breakup) [4]

Perihelion distance at different epochs [5] [2]
Epoch	Perihelion (AU)	Period (years)
1772	0.99	6.87
1805	0.91	6.74
1826	0.90	6.72
1832	0.88	6.65
1846	0.86	6.60
1852	0.86	6.62

Biela's Comet or Comet Biela (official designation: 3D/Biela) was a periodic Jupiter-family comet first recorded in 1772 by Montaigne and Messier and finally identified as periodic in 1826 by Wilhelm von Biela. It was subsequently observed to split in two and has not been seen since 1852. As a result, it is currently considered to have been destroyed, although remnants have survived for some time as a meteor shower, the Andromedids which may show increased activity in 2023. ^[6]

Discovery

The comet was first recorded on 8 March 1772 by Jacques Leibax Montaigne; ^[7] during the same apparition it was independently discovered by Charles Messier. It was also recorded in 1805 by Jean-Louis Pons, but was not recognized as the same object. Around 9 December 1805 comet Biela passed about 0.0366  AU (5.48 million  km ) from Earth. ^{[5] [8]} After the 1805 apparition a number of attempts were made by Gauss (1806) and Bessel (1806) to calculate a definitive orbit. Gauss and Olbers both noted a similarity between the 1805 and 1772 comets but they were not able to prove a link. ^[7]

3D/Biela closest Earth approach on 9 December 1805 ^[8]

Date and time of closest approach	Earth distance (AU)	Sun distance (AU)	Velocity relative to Earth (km/s)	Velocity relative to Sun (km/s)	Solar elongation
9 December 1805 ≈21:48	0.0366  AU (5.48 million  km ; 3.40 million  mi ; 14.2  LD )	0.977 AU (146.2 million km; 90.8 million mi; 380 LD)	14.3	39.6	77.7°

Confirmation as periodic

It was Wilhelm von Biela, an army officer serving at the fortress town of Josefstadt, who observed the comet during its 1826 perihelion approach (on February 27) and calculated its orbit, discovering it to be periodic with a period of 6.6 years. At the time it was only the third comet known to be periodic, after comets Halley and Encke. The comet was named after Biela, although there was initially some controversy due to a later but independent discovery by Jean-Félix Adolphe Gambart, who also provided the first mathematical proof linking the 1826 and 1805 comets (letters from Biela and Gambart were published in the same issue of the Astronomische Nachrichten ). A third claim was made by Thomas Clausen, who had independently linked the comets.

The comet appeared as predicted during its 1832 apparition, when it was first recovered by John Herschel on 24 September. ^[7] The orbital elements and ephemeris calculated by Olbers for this return created something of a popular sensation, as they showed that the comet's coma would likely pass through the Earth's orbit around October 29, but at an Earth distance of about 0.55  AU (82 million  km ). Subsequent predictions, in the media of the time, of the Earth's likely destruction overlooked the fact that the Earth itself would not reach this point until November 30, a month later, as pointed out by François Arago in an article designed to allay public fears. ^[9] Despite this, the fact that Biela's Comet was the only comet known to intersect the Earth's orbit was to make it of particular interest, both to astronomers and the public, during the 19th century.

In 1832, Greek-Austrian astronomer Georgios Konstantinos Vouris published his own calculations of the elliptical orbit of the comet entitled: Elliptical orbit calculation of Biela's Comet from 96 observations of the year 1832 (Elliptische bahnbere chung des Biela'schen cometen aus 96 beobachtungen des Jahres 1832). His article was a comprehensive overview of the elliptical orbital of Biela's Comet. ^{[10] [11]}

The 1839 apparition was extremely unfavourable and no observations were made as the comet never came closer than 1.8 AU from Earth since the comet was on the other side of the Sun. During 1839 the comet never had a solar elongation greater than 50 degrees.

Disintegration

As of 1832, comet Biela had an Earth-MOID (Minimum orbit intersection distance) of only 0.0005 AU (75 thousand km). ^[3] The comet was rediscovered on November 26, 1845, by Francesco de Vico. Initially sporting small, faint nebulousness, subsequent observations showed that something remarkable had happened to it. Matthew Fontaine Maury, observing on 14 January 1846, noted that an apparent companion was located 1 arc minute north of the comet. ^[12] After this announcement many astronomers began observing the comet, and noted that the two elements (usually referred to as "Comet A" and "Comet B" in modern nomenclature) alternated in brightness, developing parallel tails as they approached perihelion. Some observations indicated an "archway of cometary matter" extending between the two nuclei, ^[13] which might suggest that the comet had split into many more pieces than two, but were simply too faint to be observed individually.

The two components of Biela in 1852, as drawn by Secchi.

In 1852, the comet was again rediscovered more or less as predicted, with "Comet A" being rediscovered first, by Angelo Secchi on August 26. ^[14] "Comet B" was finally relocated on September 16, and once again both nuclei alternated in brightness during the period of observation. "A" was last detected on this apparition on September 26 and "B" on September 29, in both cases by Otto Wilhelm Struve. Subsequent orbital calculations indicated that the nuclei had probably split around 500 days before the 1845 apparition, ^[15] though more recent work has determined that it may have occurred near aphelion in late 1842. ^[16]

The Andromedid or Bielid meteors as seen on the night of November 27, 1872.

Neither part could be found on their predicted periodic returns in 1859 (in any case an unfavorable return for viewing), 1865, or 1872. However, on November 27, 1872, a brilliant meteor shower (3,000 per hour) was observed radiating from the part of the sky where the comet had been predicted to cross in September 1872. This was the date when Earth intersected the 1839 and 1846 meteoroid streams. These meteors became known as the Andromedids or "Bielids" and it seems apparent that they were produced by the breakup of the comet. The meteors were seen again on subsequent occasions for the rest of the 19th century, but have now faded away, due to gravitational perturbations moving the node outside of Earth's orbit.^{[ citation needed ]}

Possible observations and searches

There were, however, inconclusive observations during the 1865 and 1872 returns. Charles Talmage, using ephemerides provided by John Russell Hind, claimed to have briefly observed a nebulous object in approximately the right position in November 1865. James Buckingham also observed two nebulosities in 1865 after studying Hind's predictions, but Hind subsequently stated that they were unlikely to be Biela's Comet, as they were much closer together than the two components of the comet should have been. A puzzling observation recorded as X/1872 X1, seen by N. R. Pogson in late 1872 from the Madras Observatory, was also speculated to be a recovery of Biela's Comet, though once again this was later shown to have been unlikely.

Despite the apparent destruction of the comet, there were a number of searches for it during the later 20th century. Brian G. Marsden and Zdeněk Sekanina attempted to calculate a likely orbit for any remaining parts of the comet; it was during a search using Marsden's calculations that Luboš Kohoutek discovered Comet Kohoutek. It has been calculated that the mass of the debris left in the Andromedid meteor stream is still much less than the total mass of the comet. Given that it is more likely that the main mass loss occurred near aphelion before the 1845 apparition, it seems possible that fragment A at least may still exist as a 'dormant' comet. ^[17]

There have been several attempts to identify objects discovered subsequently either as Biela's Comet or as a remnant of it. The German astronomer Karl Ristenpart attempted several times to prove a link with the comet now known as 18D/Perrine-Mrkos, which had a very similar orbit to Biela apart from a differing Argument of Perihelion. ^[18] Despite this, it was not possible to prove any relationship and Perrine-Mrkos, an intrinsically faint object, has itself since been lost. Comet 207P/NEAT (P/2001 J1), discovered in 2001 by the NEAT asteroid survey, was also found to have a similar orbit to Biela's Comet, and it was initially thought possible that it was in some way related to it. ^[19]

2023

Propagating the very dated orbit from the 1800s, there is speculation that Biela could pass around 0.2  AU (30 million  km ) from Earth in late October 2023 ^[5] and come to perihelion in December 2023, ^[20] but Biela could just as easily be out by the orbit of Jupiter. ^[21] The 1649 meteoroid stream is expected to generate a modest increase in the December 2023 activity of the Andromedids. ^[6]

Meteoric impacts

Biela's Comet was the subject of several panics over close approaches to Earth. An 1877 newspaper illustration from Chile, captioned "inevitable impact of the Earth with Comet Biela"

Biela has sometimes been proposed as the source of meteoric impacts on Earth.

A fringe theory links together several major fires that occurred simultaneously in America, including the Great Chicago Fire, the Great Michigan Fire, and the Peshtigo Fire, claiming that they were caused by fragments of Biela's Comet striking the Earth, in October 1871. ^[22] The theory was first proposed by Ignatius L. Donnelly in 1883, and was revived in a 1985 book ^[23] and further explored in an unpublished 2004 scientific paper. ^[24] However, experts dispute such a scenario - meteorites in fact are cold to the touch when they reach the Earth's surface, and there are no credible reports of any fire anywhere having been started by a meteorite. ^{[25] [26]} Given the low tensile strength of such bodies, if a fragment of an icy comet were to strike the Earth, the most likely outcome would be for it to disintegrate in the upper atmosphere, leading to a meteor air burst. ^[27]

On November 27, 1885, an iron meteorite fell in northern Mexico, at the same time as a 15,000 per hour outburst of the Andromedid meteor shower. The Mazapil meteorite has sometimes been attributed to the comet, but this idea has been out of favor since the 1950s as the processes of differentiation required to produce an iron body are not believed to occur in comets. ^[28]

Importance in the history of the concept of luminiferous ether

Biela's Comet (and Comet Encke) had a role in the now-discredited concept of luminiferous aether : its orbit was found to be shrinking in size, which was ascribed to the drag of an ether through which it orbited.

References

1. NK 851A — OAA computing section publication
2. Orbital Elements: PC / Mobile
3. "JPL Small-Body Database Browser: 3D/Biela" . Retrieved 2023-09-22.
4. Ye, Quanzhi; Jenniskens, Peter (2022). "Comets and meteor showers". arXiv: 2209.10654 [astro-ph.EP].
5. Kinoshita, Kazuo (2003-02-13). "3D/Biela past, present and future orbital elements". Comet Orbit. Retrieved 2023-08-05.
6. Tony Phillips (2021-11-29). "Andromedid Meteor Outburst (2021)". Space Weather Archive. Retrieved 2023-09-24.
7. Gary W. Kronk. "3D/Biela". Cometography. Archived from the original on 15 December 2010. Retrieved 2010-12-15.
8. "Horizons Batch for 3D/Biela (90000092) on 1805-Dec-09" (Closest Earth approach occurs when deldot flips from negative to positive). JPL Horizons . Retrieved 2023-09-23.
9. Arago, F. Tract on comets: and particularly on the comet that is to intersect the earth's path in October, 1832 (transl. J. Farrar), Hilliard, Gray and Company, 1832
10. Matsopoulos, Nicolas T. (2012). "Η Συμβολή της Αστρονομίας στον Νεοελληνικό Διαφωτισμό - η ίδρυση του Αστεροσκοπείου Αθηνών" [The Contribution of Astronomy to the Neo-Greek Enlightenment - The Foundation of the Athens Observatory]. Acta of Conference: Rigas Ferraios, Ioannis Capodistrias, Francisco de Miranda Volume B. Thessaloniki, Greece: Aristotle University of Thessaloniki Academy of Institutions and Cultures Society: 408.
11. Staff Writers (August 30, 2022). "Elliptical Orbital of Biela's Comet (German)". The SAO/NASA Astrophysics Data System. Retrieved August 30, 2022.
12. Kronk, G. W. Cometography, Vol 2, Cambridge UP, 2003, p.157
13. Kronk, 2003, p.159
14. Kronk, 2003, p.210
15. Kronk, 2003, p.212
16. Jenniskens, P. and Vaubillon, J. "3D/Biela and the Andromedids", The Astronomical Journal, 134: 1034
17. Jenniskens & Vaubillon, 1044-5
18. Kronk, 18D/Perrine-Mrkos, cometography.com
19. "IAUC 7635: SNe; P/2001 J1". IAU Central Bureau for Astronomical Telegrams. 2001-05-29. Retrieved 2011-06-12.
20. Yoshida
21. "Speculation for 3D/Biela (90000094) in December 2023". JPL Horizons . Retrieved 2023-08-05.
22. WTBS Atlanta. Fire From The Sky. 1997.
23. Mel Waskin (1985). Mrs. O'Leary's Comet: Cosmic Causes of the Great Chicago Fire. Academy Chicago Publishers. ISBN   978-0-89733-181-4.
24. Wood, Robert (February 3, 2004). "Did Biela's Comet Cause the Chicago and Midwest Fires?" (PDF). American Institute of Aeronautics and Astronautics. Archived from the original (PDF) on 5 Feb 2009.
25. Calfee, Mica (February 2003). "Was It A Cow Or A Meteorite?". Meteorite Magazine. 9 (1). Retrieved 2011-11-10.
26. "Meteorites Don't Pop Corn". NASA Science. NASA. 2001-07-27. Retrieved 2011-11-10.
27. Beech, M. (November 2006). "The Problem of Ice Meteorites" (PDF). Meteorite Quarterly. 12 (4): 17–19. Archived from the original (PDF) on 2011-09-27. Retrieved 2011-11-13.
28. Beech, Martin (2002). "The Mazapil meteorite: from paradigm to periphery". Meteoritics & Planetary Science. 37 (5): 649–660. Bibcode:2002M&PS...37..649B. doi: 10.1111/j.1945-5100.2002.tb00845.x .

External links

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