NGC 5979
| Planetarischer Nebel NGC 5979 | |
|---|---|
 | |
| Hochaufgelöste Aufnahme mithilfe des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Südliches Dreieck |
| Position Äquinoktium: J2000.0 | |
| Rektaszension | 15h 47m 41,0s [1] |
| Deklination | −61° 13′ 04″[1] |
| Erscheinungsbild | |
| Scheinbare Helligkeit (visuell) | 11,5 mag [2] |
| Scheinbare Helligkeit (B-Band) | 11,8 mag [2] |
| Winkelausdehnung | 0,44′ × 0,34′ [1] |
| Zentralstern | |
| Bezeichnung | HD 140586 [3] |
| Scheinbare Helligkeit | +20,0 mag [4] |
| Spektralklasse | Pe [4] |
| Physikalische Daten | |
| Rotverschiebung | +0,000077 [3] |
| Radialgeschwindigkeit | +23,0 km/s [3] |
| Entfernung | 10219 ± 2.400 Lj |
| Geschichte | |
| Entdeckung | John Herschel |
| Datum der Entdeckung | 24. April 1835 |
| Katalogbezeichnungen | |
| NGC 5979 • PK 322-5.1 • ESO 136-PN3 • GC 4125 • h 3610 • | |
NGC 5979 ist ein planetarischer Nebel im Sternbild Südliches Dreieck, welcher etwa 10.200 Lj von der Erde entfernt ist.
Der planetarische Nebel NGC 5979 wurde am 24. April 1835 von dem britischen Astronomen John Herschel entdeckt.[5]
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Autor/Urheber: Judy Schmidt, Lizenz: CC BY 2.0
I won't claim this one is very interesting. Or maybe the reason it is visually uninteresting is what might make it interesting? There's virtually no Hydrogen-alpha emissions to be found, which is usually displayed as pinkish red in my other nebulas. I did include the Ha (f658n) filter but it contributed virtually no light to the image at all.
You might notice some ever so slight fringing due to some of the data being from three years prior to the rest of the data. This happens because the nebula's expansion is noticeable after a few years.
You might also notice I used two f555w filters for green. It helped reduce the noise for the green channel slightly.
Anyway, this neglected nebula doesn't even have a common name that I could find. I'd call it the Snail Shell Nebula. It also makes me think of an embryo.
Red: hst_06119_93_wfpc2_f814w_pc_sci + hst_08390_04_wfpc2_f658n_pc_sci Green: hst_06119_93_wfpc2_f555w_pc_sci + hst_08390_04_wfpc2_f555w_pc_sci Blue: hst_08390_04_wfpc2_f502n_pc_sci
North is NOT up.