More interestingly, this system is a binary. TOI-5628 A has a white dwarf companion, TOI-5628 B, spectral type DA, mag 17.4, Teff ~13000°C, mass ~0.59 M⊙, radius only 0.1 RJ. Their angular separation is ~23 arcsec, corresponding to a projected distance of ~2500 AU. 4/9 🔭 🧪 #exoplanet

This newly confirmed exoplanet orbits TOI-5628 A, a red dwarf located in the constellation Coma Berenices. TOI-5628 A is about 360 ly away, with 16.9 mag, spectral type M3V, Teff ~3000°C, mass ~0.36 M⊙, radius ~0.35 R⊙, rotation period ~28 days, similar to that of the Sun. 2/9 🔭 🧪 #exoplanet

In May 2022, I discovered a planet candidate via Planet Hunters TESS on @zooniverse.bsky.social . Today it is officially confirmed as TOI-5628 Ab, and our paper published in ApJL. I am grateful to Dr. Tianjun Gan for inviting me as a co-author. iopscience.iop.org/article/10.3... 1/9 🔭 🧪 #exoplanet

I used the SPIRIT 3 telescope (0.32-m f/8 Corrected Dall-Kirkham+CCD, Clear filter) at the @icrar.bsky.social's Mardella Observatory (MPC code E29) to remotely observe the #ArtemisII Orion spacecraft and the ICPS upper stage at approximately 20:30 on April 2, 2026. #astro

Based on the spectral data obtained by Xing Gao from the Xingming Observatory, I processed them. The Hα emission line (as well as other hydrogen Balmer lines) of T CrB was much weaker than in late January.

Interstellar Comet 3I/ATLAS = C/2025 N1 (ATLAS) = A11pl3Z Observations were made by me using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program. 🔭

On the night of Jan. 29, I remotely observed the Gaia spacecraft using the SPIRIT 3 telescope at @icrar.bsky.social's Mardella Observatory (IAU code E29). Farewell to this incredible mission that revolutionized our understanding of the Milky Way! #Gaia #GBOT #astro

Here's the discovery image I took remotely from the Burke-Gaffney Observatory @BGO.observatory.social.ap.brid.gy . Follow-up photometric and spectroscopic observations of this most recent eruption of M31N 2008-12a are strongly encouraged.🔭

Figure 1 shows the light curve I measured from the BGO data. Figure 2 shows the phase plot. My photometric data are available from the AAVSO database.

Yesterday, I remote observed the transient TCP J06330104+0303350= Gaia DR3 3130088774241620608 using the Burke-Gaffney Observatory (BGO @BGO.observatory.social.ap.brid.gy ). Based on my observations, it has been confirmed as an eclipsing WZ Sge-type dwarf nova with an orbital period of 0.05786 days🔭

In an attempt to characterize the quiescent counterpart, Prof. Shafter et al. obtained a spectrum of the putative quiescent counterpart using the Hobby-Eberly Telescope in Jan. 2023. The spectrum is dominated by a blue giant, which cannot be explained by current models.🔭

The counterpart of the nova is likely associated with a blue 20.5 mag variable star that displays 14.3 d period. At the distance of M31, absolute magnitude of the putative quiescent counterpart is ∼ −4, given its blue, would be unprecedented for known recurrent nova system.🔭

M31N 2017-01e has a recurrence time of ~2.5 yr, which is the second shortest known for any nova. After adding the two outbursts I recently discovered, the nova is known to 6 outbursts, which is the second most in the M31 galaxy. We expect the next eruption occur in Mar. 2027.🔭

I made follow-up observations of this PCCP object remotely using the Burke-Gaffney Observatory (code 851) at Saint Mary's University, and the measurements are on the PCCP. ☄️🔭

Bluesky now has over 10 million users, and I was #1,402,291!

#astro ……The work encouraged many readers to study Earth and planetary sciences with its accurate depiction of celestial objects and geology."(WGSBN Bulletins Volume 4, #12)

According to the prediction, the recurrent nova T Corona Borealis (T CrB) will outburst in the near future, and global monitoring is very necessary. We sincerely invite amateur astronomers around the world to join our initiative on monitoring T CrB, please read the initiative below.🔭 🧪

🔭🧪This is a phase plot of KH 15D (V582 Mon), which is very similar to our variable star. But our variable star has a period nearly 20 times that of KH 15D, which is very interesting and may provide new clues about planet formation. Image Credit: Aleezah Ali/University of Washington

🔭🧪 We believe it is very similar to KH 15D, which has been called as the "Rosetta Stone" for understanding planetary formation, the brightness variations may be formed by a circumbinary disk obscuring the centre binary star. This variable star has been indexed by VSX: www.aavso.org/vsx/index.ph...

Our amateur team has discovered an interesting eclipsing variable star near SH 2-241 nebula from ZTF archive data. It has a period about 830 days, more than 40% in occultation, with a bright peak at the centre of the occultation. 🔭🧪 Image Credit: DSS、PanSTARRS DR1

WNYC's Radiolab and IAU are naming asteroid 164207, Earth’s quasi-moon. Submit your favorite name now! Event Details: radiolab.org/moon-officia..., www.iau.org/news/pressre... Nomination Website: woobox.com/wc2qxd 🔭🧪

I understand. Yes, in order to make the number (such as "AC39501") on the image conform to people's reading habits, I flipped it left and right. If it were to match what it would look like from a telescope, it would look like this:

Thanks for sharing, great article! I have been following T CrB for a long time and hope it will outburst soon. By the way, I found a historical image of its 1946 outburst in the Harvard Observatory's Plates database (starglass.cfa.harvard.edu/plate/ac39501), see ALT for details. 🔭

In an urban area with serious light pollution, the Seestar S50 was used to monitor the upcoming outburst of the recurrent nova T CrB. Because Seestar S50 doesn't have this object in its database, I chose GOTO to the nearby galaxy IC 4587, which places T CrB almost perfectly at the center. 🔭

🔭 We successfully observed the Triton occultation event on October 6, 2022 at Yanqihu in Beijing, China. A paper using our data has been accepted by Astronomy & Astrophysics (A&A), which I am a co-author. This paper analyzes data from the CHEOPS Space Telescope, …… (1/2)

A low-resolution spectrum of T CrB acquired by the Xingming Observatory yesterday morning shows the Balmer emission lines and the TiO molecular absorption lines, etc. Taken by Xing Gao, and processed by me.

🔭Today is paper day! Our Nature paper on SN 2023ixf has finally been published online: www.nature.com/articles/s41... ! I am honored to be listed as a co-author. Much the data for this paper came from amateur telescopes, showing that even small facilities can produce top-notch scientific research.

I've marked the positions of the five nova candidates we discovered in the image.https://www.astrobin.com/ch64v4/B/

Partial Lunar Eclipse on October 28, 2023 🔭