WZ Del is another star among the SAAF's 50 forgotten miras. It was discovered in 1930 by Cuno Hoffmeister. Not much observational history exists for the star before SAAF began observing it in 2012. Its period, currently 259.1 days, is quite short and appears to be stable.
Berkeley Earth global temperature to April 2026 + current trend forward.
Current temperature: 1.41
Rate of increase:
1970-2026: 0.21 deg/10 years
1970-2010: 0.19
2010-2026: 0.36
2015-2026: 0.30
With current trend, 1.5 degrees will be reached in 2030, 2.0 in 2047.
V2330 Cyg is a mira among the SAAF's 50 forgotten miras. Discovered by Mike Collins, UK, in 2000 and independently by Lennart Dahlmark, Sweden, in 2001. The average period since 1899 is 382.5 days. Its current period is similar, 383.6 days.
R Boo is a bright and fairly short-period mira. Here is a phase diagram with observations made within SAAF/V 1990-2025. Most are visual (black) but also some photometric with V-filter (green). The star's period is quite stable with a variation between 222 and 226 days during the observed time.
WX Del is one of the SAAF's 50 Forgotten Miras. It was discovered by Cuno Hoffmeister in 1930. WX Del is the longest-period mira of the 50 on the SAAF's list. The current period is 528.8 days, close to the average period since 1897 of 528.3 days. The diagram shows SAAF observations 2012-2026.
R Tri is a short-period and bright mira. It was discovered in 1890 by the English amateur astronomer THEC Espin and independently by Williamina Flemming at Harvard. The phase diagram shows 569 observations made by SAAF/V from 1990 onwards. From these observations the average period is 265.16 days.
Berkeley Earth global temperature to May 2026 + trend forward compared to 1850-1900.
Current temperature: 1.41 (May 1.35)
Rate of increase:
1970-2026: 0.21 deg/decade
1970-2010: 0.19
2010-2026: 0.36
2015-2026: 0.29
With current trend, 1.5 degrees will be reached in 2029, 2.0 in 2046.
From my database of maxima for mira variables.
AF Car is on my list of meandering miras. Its period has since 1896 varied between 425 and 456 days. The star has not been observed much before the 1970s so much of its older history has been taken from #DASCH.
More miras at var.saaf.se/mirainfooc.php
Met Office HadCRUT5 global temperature to March 2026 + current trend forward.
Current temperature: 1.42
Rate of increase:
1970-2026: 0.20 deg/10 years
1970-2010: 0.19
2010-2026: 0.33
2015-2026: 0.26
With current trend, 1.5 degrees will be reached in 2029, 2.0 in 2047.
From my database of maxima for mira variables.
T Scl is on my list of miras with changing period. It is also an example of their unpredictability. 1890-2010 it had an increasing period. But after 120 years the pattern has changed and now the period is decr.
More miras at var.saaf.se/mirainfooc.php
