from VSSC92
One possibility would be to reinstate some of the dropped Mira type variables back on to the programme, since many of these reach binocular brightness at maximum. However, there are already many variables on the Eclipsing Binary program that are currently neglected by most binocular observers. Many of these variables DO vary by much larger amounts than do many of the Semi-Regular and Irregular variables that most binocular observers follow.
As an indication of what is available, the table below summarises my observations of some of these variables during the summer and autumn of 1996. Although there may be advantages in calculating/looking up the predicted times of eclipses in advance, I usually find it more rewarding to find the eclipses by trial and error. It is worth noting that in some cases the observed magnitudes may be significantly different from the values listed on the charts - not all chart ranges are visual ranges (and different observers may see slightly different values anyway).
Star | Chart Range | Type | Period | Observed Range Max ------- Min | Notes | |
---|---|---|---|---|---|---|
EO Aur | 7.5-8.0B | EA | 4.066d | 8.1/8.2 | (1) | |
IU Aur | 8.2-8.9V | EB | 1.811d | 8.5/8.6 | (1) | |
LY Aur | 6.7-7.4V | EB | 4.002d | 6.8 | 7.5 | (2) |
ZZ Boo | 6.6-7.4 | EA | 4.99d | 6.6 | 7.5 | |
RS CVn | 8.0-9.5 | EA | 4.80d | 7.8 | 8.9 | |
RZ Cas | 6.4-7.8 | EA | 1.195d | 6.6 | 7.8 | |
TV Cas | 7.3-8.4 | EA | 1.81d | 7.5 | 8.2 | |
TW Cas | 8.3-9.0V | EA | 1.428d | 8.6/8.7 | (1) | |
U Cep | 6.7-9.0 | EA | 2.49d | 6.8 | 9.1 | |
GK Cep | 6.9-7.5 | EB | 0.94d | 7.0 | 7.5 | |
U CrB | 7.7-8.8V | EA | 3.452d | 7.9 | 8.7 | |
TW Dra | 7.5-9.8 | EA | 2.81d | (6.8) | (1),(3) | |
AI Dra | 7.1-8.1 | EA | 1.20d | 7.2/7.5 | (1),(4) | |
BH Dra | 8.0-8.6 | EA | 1.82d | 7.9 | (1) | |
u Her | 4.6-5.3 | EB | 2.051d | 4.8 | 5.4 | |
EE Peg | 6.9-7.6 | EA | 2.63d | 6.7 | (1) | |
DM Per | 7.6-8.4 | EA | 2.73d | 8.1/8.2 | 8.5 | (5) |
IQ Per | 8.0-8.7 | EA | 1.74d | 6.9/7.0 | 7.2 | (6) |
IZ Per | 7.7-8.9 | EA | 3.69d | 7.6/7.7 | (1) | |
RW Tau | 8.0-11.6 | EA | 2.769d | 8.0 | (9.5) | (7) |
HU Tau | 6.0-6.8 | EA | 2.06d | 5.6/5.7 | 6.7 | |
W UMa | 7.7-8.4 | EW | 0.334d | 7.9 | 8.5 | |
TX UMa | 6.9-8.5 | EA | 3.06d | 6.9 | (1) |