Celestial hemisphere:  Southern  ·  Constellation: Crux (Cru)  ·  Contains:  35 Cru  ·  39 Cru  ·  Becrux  ·  Becrux (β Cru)  ·  Crux  ·  Gacrux  ·  Herschel's Jewel Box  ·  Jewel Box  ·  NGC 4103  ·  NGC 4337  ·  NGC 4349  ·  NGC 4439  ·  NGC 4609  ·  NGC 4755  ·  NGC 4852  ·  Part of the constellation Crux (Cru)  ·  The star 35 Cru  ·  The star 39 Cru  ·  The star Gacrux (γ Cru)  ·  The star Ginan (ε Cru)  ·  The star Mimosa  ·  The star δ Cru  ·  The star ι Cru  ·  The star λ Cru  ·  The star μ1 Cru  ·  The star μ2 Cru  ·  bet Cru  ·  del Cru  ·  eps Cru  ·  gam Cru  ·  And 6 more.
Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
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Crux constellation starfield in HHSS colors and Ha only

Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
Powered byPixInsight

Crux constellation starfield in HHSS colors and Ha only

Equipment

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Acquisition details

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Description

1h 25min of integral Ha & SII exposure of the central part of Crux constellation - captured remotely using Telescope #4 (Nikkor 200mm f/2, FLI Microline 16200) system of ChileScope observatory, also known as VST - a Very Small Telescope)), over 2 separate observational session carried out on Aug 21 & 23, 2023.

The color mapping for the original revisions and revisions B and D: Ha, Ha, SII, SII to LRGB. Revisions E, F, G are using only Ha component based on 45min subset of integral exposure taken on Aug 21, 2023.


There is quite a collection of objects identifiable in the lower left corner of this frame, including but not limited to:

[1] Gum 43 / RCW 65 (HII region): http://galaxymap.org/cat/view/gum/43

[2] Gum 44 / RCW 66, 67 (HII regions): http://galaxymap.org/cat/view/gum/44

[3] RCW 68 (HII regions): http://galaxymap.org/cat/view/rcw/68

[4] Gum 45 / RCW 69 (Planetary nebula): http://galaxymap.org/cat/view/gum/45




"aCru Nebula X1" also featured on the image [5] obtained earlier with Chilescope T3 instrument is also visible here:

[5] https://www.astrobin.com/qvl11f/B/


Two additional compact structures are identified here as:

[6] Part of BRAN 386 object group (including BRAN 386E HII region): https://simbad.cds.unistra.fr/simbad/sim-id?Ident=bran+386&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id

[7] Part of BRAN 383 object group that seems to be a part of march large nebula labeled "Cru Nebula X4" for future reference: https://simbad.cds.unistra.fr/simbad/sim-id?Ident=bran+383&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id



Comments

Revisions

  • Final
    Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
    Original
  • Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
    B
  • Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
    D
  • Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
    E
  • Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
    F
  • Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev
    G

B

Title: Original revision of the image with full star suppression applied (HHSS colors)

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D

Title: Manually annotated starless version of the revision B (HHSS colors)

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E

Title: Same scene in Ha only (45 min subset of integral exposure taken on Aug 21, 2023 alone)

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F

Title: Ha only version of the scene (revision E) with full star suppression applied

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G

Title: Manually annotated starless version for Ha only (revision F)

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Sky plot

Sky plot

Histogram

Crux constellation starfield in HHSS colors and Ha only, Alexandr Zaytsev