Table 1.
Relevant properties of Eridanus 2 and its putative cluster, known from previous studies.
| Parameter | Eridanus 2 | Putative cluster |
|---|---|---|
| Right ascension |
 |
 |
| Declination |
 |
 |
| MV (mag) | −7.1 ± 0.3 | −3.5 ± 0.6 |
| D (kpc) | 366 ± 17 | – |
| Rh (pc) | 277 ± 14 | 13 ± 1 |
| μint (km s−1) | 75.6 ± 1.3 ± 2.0 (a) | – |
| σint (km s−1) |
 |
– |
| Mh (M⊙) |
 |
– |
| Mh/LV (M⊙/L⊙) |
 |
– |
| μ[Fe/H] (dex) | −2.38 ± 0.13 | – |
| σ[Fe/H] (dex) |
 |
– |
Notes. We list the positions on the sky, absolute V-band magnitudes, heliocentric distance, projected half-light radii, intrinsic line-of-sight systemic velocity and velocity dispersion, half-light mass, mass-to-light ratio, mean metallicity, and metallicity dispersion. The first five parameters are taken from the photometric study by Crnojević et al. (2016). The last six parameters were determined by Li et al. (2017) based on spectroscopy at large radii.
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