Celestial hemisphere:  Northern  ·  Constellation: Perseus (Per)

Image of the day 11/14/2020

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NEW DISCOVERY Strottner-Drechsler 104, Andreas Zirke
NEW DISCOVERY Strottner-Drechsler 104
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NEW DISCOVERY Strottner-Drechsler 104

Image of the day 11/14/2020

Getting plate-solving status, please wait...
NEW DISCOVERY Strottner-Drechsler 104, Andreas Zirke
NEW DISCOVERY Strottner-Drechsler 104
Powered byPixInsight

NEW DISCOVERY Strottner-Drechsler 104

Equipment

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Acquisition details

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Description

NEW DISCOVERY Strottner-Drechsler 104

INFORMATION

Coordinates: 04:06:05.26 +42:41:20.37 (J2000)

Size: 24 arc minutes

Constellation: Perseus

Discoverers: Marcel Drechsler, Xavier Strottner

Photo: Andreas Zirke (H-alpha, OIII, RGB)

Description

A possible new planetary nebula in the constellation Perseus. Discovered by Marcel Drechsler and Xavier Strottner in early 2020, the candidate has a diameter approximately the size of the full moon (if the outer parts of the structure are included) and is located at a distance of 1085 or 4740 light years from Earth - depending on which of the two possible central stars is used to calculate the distance.

Whether this object is a real planetary nebula is not yet clear at the moment. A spectrum will hopefully soon bring certainty.

The potential central white dwarf is located east of the central H-alpha structure, but in the middle of a diffuse OIII cloud.

The OIII signal is extremely faint, but could be detected by continuum subtraction.

The central star is a hot subdwarf of class D sdB. It is known that this class of stars is not suitable for PN formation.

However, there are indications that the classification of the star is not correct.

At the coordinates 04 06 7.440 +42 34 48.60 there is another white dwarf with a temperature of 27000 Kelvin, which could also be responsible for ionization. The star's position is at the periphery of the candidate and its speed is high enough to be a central star. It is possible that the white dwarf was once part of a binary system, this could explain the appearance of the nebula.

Another interesting detail a possible ring-shaped structure, which appears as a southern arc around the nebula.

Rings of this kind are not uncommon around planetary nebulae.

***

White dwarf 1

- KPD 0402+4232 (Hot subdwarf)

- spectral class: sdB D

- temperature: 9183.25K (These data seem doubtful)

- magnitude: 15.4453

- parallax: 0.8100

- distance: 1453 parsecs

- proper motion: RA -5,123 / -1,212

White dwarf 2

- WDJ040607.42+423448.67

- Pwd: 99,9

- temperature: 27222 Kelvin

- pm: RA 23.297 / DEC -17.021

- mass (sun): 0,62%

- magnitude: 18.229490

- parallax: 2.9852

- distance: 333 Pc

***

Exposure

RGB each 36x5min

Ha 3nm 94x15min

SII 3nm 20x15min

Ha 7nm 114x10min

OIII 3nm 94x15min

Total exposure 80 hours

Setup

3x Takahashi Epsilon 130D,

3x Atik one 9.0,

Astrodon RGB filter, Astrodon 3nm narrowband.

Mounting: EQ8

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NEW DISCOVERY Strottner-Drechsler 104, Andreas Zirke