Alert Notice 771: V1117 Her in deep fade again
Abstract:
AAVSO Young Stellar Object (YSO) Section leader Michael Poxon requests coverage of the YSO V1117 Her, which is at a deep minimum of visual magnitude 15.1 as of 2022 March 9.45 UT. Continuing coverage is requested to monitor this YSO.
Justification:
V1117 Her has experienced deep minima at semi-regular intervals of about 400 days. However, the last comparable minimum was only about 100 days ago, indicating potential new processes in the circumstellar environment.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| V1117 Her | 12.20 | UXOR |
Cadence: Nightly Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
V (Johnson)
Comparison Stars:
Finder charts with comparison stars are available via the AAVSO Variable Star Plotter (VSP, https://apps.aavso.org/vsp/).
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
https://forums.aavso.org//t/observing-campaign-771-alert-notice-771-v1117-her-in-deep-fade-again/355
Notes:
Principal Investigator: Michael Poxon; Imported Campaign (Alert Notice #771)