View here: Details for Nova in Sagittarius - V6598 Sgr = N Sgr 2023 No. 3 (= TCP J17525020-2024150)
Abstract: V6598 Sgr = N Sgr 2023 No. 3 (= TCP J17525020-2024150) was discovered independently by Andrew Pearce (Nedlands, W. Australia) on 2023 July 15.4590 UT at mag 10.3 unfiltered CCD, using Canon 800D digital camera + 85-mm f/1.2 lens, and by Yuji Nakamura (Kameyama, Mie, Japan; reported to CBAT via the National Observatory of Japan) on 2023 July 15.522 UTat mag 9.6: does not give filter, using 135-mm F/4.0 lens +CMOS camera. Spectroscopy indicating the object to be a nova was obtained by: 1) O. Garde et al. (ATel #16135) on 2023 Jul. 15.95 and 16.04 UT using the 2SPOT Alpy600 and eShel spectrographs in Chile. They report that “the source is a classical nova in the early, optically thick stage of expansion.” 2) G. Masi, on 2023 Jul. 16.867 UT (low resolution) using a 200 lines/mm grating on the 14” robotic unit part of the Virtual Telescope Project facility in Manciano, Italy (CBET 5278).
Justification: Observations across multiple bands are requested to study the nova V6598 Sgr as it continues to evolve across various bands and spectrums.