Explorer

Search

Active Regions 12874 and 12875 vanished to plages

Whitelight — September 23, 2021 at 10:11 AM · by isontheline · Wolf 49 · A 0 ⚠Warning — Your eye must be behind a suitable filter! Never look at the Sun without proper visual protection! Can cause serious eye damage or blindness!

Whitelight solar observation made on September 23, 2021 by isontheline and published on Wolf.Solar. Wolf number 49 (3 groups, 19 spots). Naked-eye A number 0. Carrington rotation 2248. Tags: AR12871, AR12872, AR12873, HARP6516, HARP6517, HARP6518.

Counts

A number (naked eye) ⚠Warning — Your eye must be behind a suitable filter! Never look at the Sun without proper visual protection! Can cause serious eye damage or blindness!0
Groups3
Groups North2
Groups South1
Spots19
Spots North11
Spots South8
Plages2
CV number57
Q value10

Conditions

Seeing3 / 5
Cloud cover (octas)0

Ephemerides

Carrington rotation2248
L₀15.38°
B₀7.02°
P25.27°
Declination-0.24°
Julian day2459480.92431

That day in the community

Daily mean Wolf number49
Observations1
CR2248
See everything in search

Comments

GroupTypeSunspotsQ ValueCV-number
AR12871 / HARP6516Dko8443
AR12872 / HARP6517Cai839
AR12873 / HARP6518Cro335
Total Sunspots / Q / CV-191057

AR12871AR12872AR12873HARP6516HARP6517HARP6518

View on Wolf.Solar ↗