Table 1
Stellar parameters of Wray 15-788 and HD 98363.
| Parameter | Value | Reference(s) | |
|---|---|---|---|
| Wray 15-788 | HD 98363 | ||
| Right ascension (J2000) | 11:17:51.87 | 11:17:58.14 | (1) |
| Declination (J2000) | −64:02:05.60 | −64:02:33.35 | (1) |
| Spectral type | K3IVe | A2V | (2,3) |
| Mass (M⊙) |  |
 |
(2,4) |
| Effective temperature (K) |  |
 |
(2,4) |
| Luminosity (L⊙) |  |
 |
(2,4) |
| Age (a) (Myr) | 11 |
 |
(2,4) |
| Parallax (mas) | 7.159 ± 0.027 | 7.215 ± 0.034 | (1) |
| Distance (pc) | 139.126 ± 0.52 | 138.044 ± 0.66 | (1,5) |
| Proper motion (RA) (mas) | − 28.583 ± 0.042 | − 28.491 ± 0.053 | (1) |
| Proper motion (Dec) (mas) | − 1.411 ± 0.040 | − 0.795 ± 0.051 | (1) |
| V (mag) | 11.89 ± 0.08 | 7.85 ± 0.01 | (2,6,7) |
| B−V (mag) | 1.11 ± 0.09 | 0.18 ± 0.01 | (2,6,7) |
| J (mag) | 9.39 ± 0.02 | 7.53 ± 0.02 | (2,8) |
| H (mag) | 8.59 ± 0.04 | 7.48 ± 0.03 | (2,8) |
| Ks (mag) | 8.18 ± 0.03 | 7.50 ± 0.02 | (2,8) |
| W1 (mag) | 7.75 ± 0.02 | 7.36 ± 0.03 | (2,9) |
| W2 (mag) | 7.49 ± 0.02 | 7.43 ± 0.02 | (2,9) |
| W3 (mag) | 6.42 ± 0.02 | 6.93 ± 0.02 | (2,9) |
| W4 (mag) | 3.88 ± 0.02 | 4.64 ± 0.02 | (2,9) |
Notes.
(a) The primary, HD 98363, has a most likely age of 11 Myr, but since the error bars of the primary overlap the main sequence in the Hertzsprung-Russell diagram, the 95% confidence range of 22–480 Myr does not contain the mode. Given its membership in Sco-Cen, this is not a useful age constraint. The secondary, Wray 15-788, is in a stage of evolution where we can place meaningful limits on the age, so we adopt the system age as that of the secondary, 11 Myr with 95% CL range of
Myr.
References. (1) Gaia Collaboration (2018); (2) Pecaut & Mamajek (2016); (3) Houk & Cowley (1975); (4) Sect. 5.1 of this work; (5) Bailer-Jones et al. (2018); (6) Henden et al. (2012); (7) Høg et al. (2000); (8) Cutri et al. (2012a); (9) Cutri et al. (2012b).
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