astro

Astronomy sketches

---

Project maintained by baltth Hosted on GitHub Pages — Theme by mattgraham

70 Ophiuchi

Main page – Index

70 Oph – Double star in Ophiuchus

Object	70 Ophiuchi
Observed at	Dunaharaszti, HU, 2025-08-04
NELM	~ 4.0
Aperture	127 mm
Magnification	100x
FOV	0.68°

Object data

Objects	70 Oph A	70 Oph B
Fetched as	HD 165341
Desc.	Main sequence star †	Orange dwarf star
RA	18h 05m 27s †
Dec	2° 30’ 0” †
Magnitude	4.1	6.1
Spectral class	K0V SB †	K4

† fetched from astronomyapi.com

Links

• Full sketch
• Original sketch