After thorough consideration we selected several objects that could possibly be sources of an observable nova super-remnant. In the summer season of 2025 we intended to carry out trial imaging with about 10 hours in each narrow band filter, so that we could decide which fields we would photograph in real depth. Here are the results:
V825 Herculi
| RA | Dec | Galactic latitude [˚] | Distance [pc] | Angular size corresponding to linear size of 50pc [‘] |
| 17 18 37.00 | 41 15 51.2 | 34,3 | 1048 | 164 |
The nebulosity around the candidate source is visible in H alpha but not in OIII – promising target.
ZTF18abaebjo
| RA | Dec | Galactic latitude [˚] | Distance [pc] | Angular size corresponding to linear size of 50pc [‘] |
| 19 17 47.54 | 68 29 17.3 | 22,7 | 2878 | 60 |
Similar structures in different telescopes in H alpha. Clearly seen arc nebulosity on the top part of images. If connected with bright star to the right, its linear size should be around 2 parsecs. The object recommended for deep imaging.
SDSS J195939.71+655440.9
| RA | Dec | Galactic latitude [˚] | Distance [pc] | Angular size corresponding to linear size of 50pc [‘] |
| 19 59 39.71 | 65 54 40.9 | 18 | 3774 | 45 |
Lack of data.
V838 Her
| RA | Dec | Galactic latitude [˚] | Distance [pc] | Angular size corresponding to linear size of 50pc [‘] |
| 18 46 31.47 | 12 14 02.1 | 6,6 | 3128 | 55 |
No useful data at all. But theoretically this one is the best candidate. Worth to look at it in the next season.