| l Car | δ Ceph | FF Aql | |
|---|---|---|---|
| Period | 35.54804 | 5.366316 | 4.470916 (first overtone) |
| Distance | 560 +- 23 pc | 273 +- 11 pc | TBD |
| Mv | -5.58 | -3.47 | TBD |
| Mi | -6.53 | -4.13 | TBD |
| E(B-V) | 0.169 | 0.072 | 0.219 |
| <B> | 5.009 | 4.611 | 6.128 |
| <V> | 3.729 | 3.958 | 5.372 |
| <Ic> | 2.557 | 3.208 | 4.510 |
| <J> | 1.675 | 2.689 | 3.929 |
| <H> | 1.200 | 2.378 | 3.575 |
| <K> | 1.079 | 2.305 | 3.489 |
NB1 : values used for absorption corrections :
Rv = 3.07 + 0.28 (B-V)0 + 0.04 E(B-V)
η = E(V-I)/E(B-V) = 1.250 [1 + 0.06 (B-V)0 + 0.014 E(B-V)]
Av = Rv E(B-V)
Ai = (Rv - η) E(B-V)The IR values are derived from Fitpatrick (1999, PASP 111, 63) :
Aj = 0.276 Av
Ah = 0.170 Av
Ak = 0.112 AvNB2 : For the absolute magnitude of δ Ceph , the Lutz-Kelker correction of Benedict is used: -0.015