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NEW DISCOVERY! Strottener-Drechsler Object 20, 


            Maicon Germiniani
NEW DISCOVERY! Strottener-Drechsler Object 20
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NEW DISCOVERY! Strottener-Drechsler Object 20

Technical card

Imaging telescopes or lenses: Teleskop Service TS 115 / 800 Triplet APO

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Skywatcher AZEQ5

Guiding cameras: QHYCCD Qhy5L II

Focal reducers: TS Optics TS PHOTOLINE 0.79x reducer / corrector

Software: Pleiades Astrophoto S.L. PixInsight  ·  APT - Astro Photography Tool Apt  ·  Adobe Photoshop 6 CS  ·  DeepSky Stacker Deek Sky Stacker 3.3.4

Filters: Astrodon LRGB 1.25" E series Gen 2  ·  Optolong H-Alpha 7nm

Frames: 132x600"

Integration: 22.0 hours

Basic astrometry details job: 3792399

RA center: 9h 26' 33"

DEC center: -22° 28' 15"

Pixel scale: 2.410 arcsec/pixel

Orientation: 7.865 degrees

Field radius: 0.899 degrees

Resolution: 1644x2126

Data source: Backyard


I am happy to announce a new discovery by my dear friends Marcel and Xavier.
I had the opportunity to participate, collecting the data for the composition of this beautiful image.
Strottner-Drechsler Object 20 (StDr Object 20)
The Object is a so called a "cataclysmic nova" and probably it is the lost Nova, which was observed by Chinese astronomers in 1065.
The central star is a binary of a white dwarf and a RRLyr type star. Both stars orbit extremely closely in only 2 solar radii at a distance.
Data: Maicon Germiniani
Discovered in January 2020 by Marcel Drechsler
and Xavier Strottner
Full name: Strottner-Drechsler Object 20 (StDr Object 20)
Analyses: Stefan Kimeswenger, Marcel Drechsler
Technical data:
Telescope triplet 115/800 (Teleskop-Service Ransburg)
Câmera: ZWO ASI 1600MMCool (ZWO Astronomy Cameras)
Halpha: 120x600 - Total 20 hours (Optolong Astronomy Filter)
RGB: 12 x 300 (each channel) - Total 3 hours

A small addition from the discoverers ;-)

In August 1064, Chinese and Korean astronomers observed a new star in the constellation of T'ien-Miao (today Hydra).This new star was only visible in the sky for a short time and was described as "as bright as a lamp".today there is no longer a very bright star in this part of the sky, but Xavier and I discovered a structure in this part of the sky which could probably be the lost remains of the Liao Shih Nova from 1064/1065.

We are very grateful to Stefan Kimeswenger of the Institute of Astro & Particle Physics Innsbruck for the analysis and determination of this extraordinary object, which is a nova event from the interaction of two very close stars. Possibly the structure originates from a relatively short "common envelope" phase of the two stars. The companion star is in the atmosphere of the primary star. This rare event leads to the loss of torque and the ejection of a part of the atmosphere of the primary star.

Coordinates: 09:26:20.58 -22:23:39.13 (J2000)
Constellation: Hydra
Diameter: 28 up to 94 arc minutes



Maicon Germiniani
License: None (All rights reserved)

Sky plot

Sky plot


NEW DISCOVERY! Strottener-Drechsler Object 20, 


            Maicon Germiniani