In the Vinony graph
Vinony's link graph records 335 inbound references to Q841138, and connects out to binary star, apparent magnitude and Messier 47.
It sits within the topics Monoceros, NGC objects and Planetary nebulae.
Vinony links it to 35 Wikipedia language editions.
Key facts
- Right ascension
- 07 09 22.52166
- Declination
- −00 ° 48 ′ 23.6112 ″
- Distance
- 4,760 ly (1,458 pc ) ly
- Apparent dimensions v
- 0.91 ′
- Constellation
- Monoceros
- Radius
- 2 ly
- Designations
- Butterfly Nebula, Bug Nebula
via Wikipedia infobox
Wikidata facts
- Distance from Earth
- 1384.466
- Image
- NGC2346.jpg
Show 11 more facts
- catalog code
- AAVSO 0704-00
- spectral class
- A2V
- Commons category
- NGC 2346
- apparent magnitude
- 11.188902
- time of discovery or invention
- 1790-03-05
- parallax
- 0.7223
- radial velocity
- 47.00
- right ascension component of proper motion
- -2.072
- declination component of proper motion
- -1.213
- right ascension
- 107.34383991685002
- declination
- -0.80655861037
Sources (1)
via Wikidata · CC0
~2 min read
Encyclopedic overview
NGC 2346 is a planetary nebula near the celestial equator in the constellation of Monoceros, less than a degree to the ESE of Delta Monocerotis. It is informally known as the Butterfly Nebula. The nebula is bright and conspicuous with a visual magnitude of 9.6, and has been extensively studied. Among its most remarkable characteristics is its unusually cool central star, which is a spectroscopic binary, and its unusual shape.
The nebular is bipolar in form, with modest outflow velocities in the range of 8–11 km/s, while the center is girded by an expanding belt of molecular gas. The electron density of the nebula is on the order of 400 per cubic centimeter. The ionization of the nebula is the result of ultraviolet emission from the binary companion. The stronger infrared emission from molecular emission is coming from the belt, which is expanding at the rate of 16 km/s. The mass of the molecular gas in the nebula is estimated to be in the range of 0.34–1.85 M☉, and is much greater than the mass of the ionized gas.
Excerpted from Wikipedia’s “Q841138” article, available under the CC BY-SA 4.0 licence.