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Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Eridanus [1] |
Right ascension | 04h 16m 08.84s [2] |
Declination | −24° 03′ 58.6″ [2] |
Characteristics | |
A | |
Evolutionary stage | Blue supergiant [2] |
B | |
Evolutionary stage | Yellow hypergiant [2] |
Astrometry | |
Distance | 17.6 billion [2] ly |
Details [2] | |
A | |
Luminosity | 125,000 L☉ |
Temperature | 14,000 K |
B | |
Luminosity | 50,000 L☉ |
Temperature | 5,250 K |
Other designations | |
EMO J041608.8-240358 [2] |
Mothra, or EMO J041608.838-240358.60, is a binary system with a possible transient, [3] in the constellation of Eridanus. Mothra is in the galaxy cluster MACS J0416.1-2403, nicknamed the "Christmas Tree Galaxy Cluster". [4]
The Mothra system is located at redshift z = 2.091 or about 10.5 billion light years away, and is notable for being one of the most distant star systems ever discovered. [2]
The Mothra system is located in is LS1. LS1 is believed to be 10,000-1,000,000 M☉ and is classified as a dwarf galaxy or globular cluster. LS1 and the Mothra system are behind the galaxy cluster MACS J0416.1-2403, and they used to same galaxy cluster as a gravitational lens to discover LS1 and Mothra. [5]
Mothra consists of two supergiant stars, a yellow supergiant/hypergiant? and a blue supergiant. As of 2025, the orbital characteristics of the Mothra system is unknown. [2]
The primary component of the Mothra system is classified as a yellow supergiant or yellow hypergiant.
Mothra A has a size of 271 R☉, a luminosity of 50,000 L☉, a temperature of 5,250 K, and has an initial mass of 15 M☉. [2]
The secondary component of the Mothra system is classified as a blue supergiant.
Mothra B has a size of 60 R☉, a luminosity of 125,000 L☉, and a temperature of 14,000 K. [5] [2]