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
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); September 24, 1852 (fragment B)
Next perihelion	Last seen September 1852
TJupiter	2.531
Earth MOID	0.0005 AU (75 thousand km); (epoch 1832)
Physical characteristics
Dimensions	≈0.5 km (pre-breakup)

Epoch	Perihelion (AU)	Period (years)
Perihelion distance at different epochs^[5]^[1]
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]

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^ NK 851A — OAA computing section publication
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[2] NK 851A — OAA computing section publication

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