Deep Sky Object in Spring
ESO378-1 (Planetary Nebula in Hydra)


Date & Time: Feb 23 2020, from 24:37 to 25:21 JST(+0900)
Composed 12 shots with 4 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight


ESO378-1 / Planetary Nebula
R.A.11h 26m 43.7s (2000.0)
Dec.-34°22' 18" (2000.0)
Apparent Size3.0'
Real Size3 light yrs.
Magnitude12.6
Distance3500 light yrs.
Other IDsKohoutek 1-22, PK 283+25.1
This image shows you a minor round planetary nebula with a diameter of 3 arc minutes positioned at about 3 degrees southwest of xi Hydrae in central region of the constellation. The nebula has a nickname of "Southern Owl Nebula" because the appearance seems the lightened Owl Nebula (M97) in Ursa Major. ESP378-1 shows us the bluish color due to the OIII emission lines from ionized oxygen atom. We living in the northern hemisphere have limited opportunities to observe the nebula because it has comparatively lower culmination altitude. It has been estimated that the nebula is approximately 3500 light years away.



PK238+34.1
PK339+88.1 & NGC4725

Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
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