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**Edwin G.** @EdwinG@mstdn.moimeme.ca · Apr 9

A comet has been discovered, temporarily named SWAN25F and it is visible to the east before sunrise.

https://www.cbc.ca/news/science/comet-swan25f-1.7503849
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Une comète a été découverte, nommée temporairement SWAN25F et elle est visible à l’est avant l’aube.

https://blogs.futura-sciences.com/feldmann/2025/04/09/swan25f-une-comete-pour-les-leve-tot/

CBCThere's a new comet in the sky, and it's already visible through binoculars | CBC NewsOne of the great things about astronomy is that it’s always full of surprises, especially when it comes to comets — you just can’t predict new ones. But there’s a lot of buzz around a recently discovered comet that has quickly brightened.

#Comet #Comète #SWAN25F

**Daniel Fischer** @cosmos4u@scicomm.xyz · Apr 9

Apr 9

Daniel Fischer @cosmos4u@scicomm.xyz

And so the comet formerly known as #SWAN25F has finally received an official designation: C/2025 F2 (SWAN). The respective CBET http://www.cbat.eps.harvard.edu/iau/cbet/005500/CBET005538.txt is just out: perihelion will be on 1 May at 1/3 au, coinciding with a predicted peak magnitude of 3.6 - albeit at an elongation of only 19° and "highly uncertain" as the brightness behavior so far isn't well understood and "[o]bservers have commented on a clear outburst in brightness having occurred around April 5." Image: https://www.facebook.com/photo/?fbid=9616963628419224

Long tail contrast-boosted. Picture by Christoph Gerhard, Münsterschwarzach monastery observatory, Germany, from yesterday

**Deutschland** @de@pubeurope.com · Apr 8

**Jorma Ryske** @JormaRyske@astrodon.social · Apr 8 *

Apr 8 *

Jorma Ryske @JormaRyske@astrodon.social

Here #comet #SWAN25F images taken today early morning 8th April from my remote observatory at Spain. SWAN25F is quite low in the morning sky near Pegasus square upper area between stars Alpheratz and Scheat. It's magnitude is about 9, tail visible almost one degree toward PA 300deg and coma diameter is 5'. Animation 18x30sec in the link below shows also moving tail details.
More info here https://www.taivaanvahti.fi/observations/show/133765

Color image of comet SWAN25F, Green/turquoise coma is glowing because of C2 ions emission.

Black and white image show comets quite long tail almost 1 degree toward upper right

**Dr. John Barentine FRAS** @JohnBarentine@astrodon.social · Apr 7

Apr 7

Dr. John Barentine FRAS @JohnBarentine@astrodon.social

Looks like new #comet #SWAN25F is not going to get any above the E horizon before dawn. This is a projected track for the next month using Stellarium & orbital elements from Project Pluto's "Pseudo-MPEC" (https://www.projectpluto.com/swan.htm) View is at start of astronomical twilight.

A simulated view of the night sky toward the eastern horizon around dawn in mid-April 2025 as seen from northern latitudes. The predicted apparent path of Comet SWAN25F is shown as a cyan line with small comet symbols for its position every three days, making a diagonal line across the center. In the foreground are landscape and city lights. Stars appear in the night sky above with stick-figure constellation lines, namely for the constellation Pegasus.

#Astronomy

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