§
The Moon’s getting bright again. Don’t despair; do doubles.
For August 2019, here’s a short selection of double and multi-star systems from my life list for your observing campaign. They are all pretty easy.
| star | also known as | alternate catalogue(s) |
|---|---|---|
| θ (theta) Lyr | Sh 292 and 21 Lyr | SAO 68065, HIP 94713 |
| OΣ525 Lyr | STT 525 (Otto Struve) or SHJ 282 | SAO 67566, HIP 92833 |
| Σ2470 Lyr | STF 2470 or HD 178849 | SAO 67870, HIP 94043 |
| 54 Sgr | HJ 599 | SAO 162883, HIP 96808 |
| HD 174005 Sct | STF 2391 | SAO 142640, HIP 92296 |
An interesting quality of double stars is their resistance to the ever encroaching infiltration of light pollution. So, have a go. See if you can split them and detect colour. How different are they in brightness? Please share your discoveries.
Be seeing you.
Blake Nancarrow
astronomy at computer-ease dot com
No comments:
Post a Comment