Where is Udachny?

Aykhal68.9 km · 42.8 mi → Olenyoksky210.3 km · 130.7 mi → Olenyok230.7 km · 143.4 mi → Chernyshevskiy379.6 km · 235.9 mi → Suntarskiy400.8 km · 249.0 mi → Mirny439.4 km · 273.0 mi → Mirninskiy Rayon442.7 km · 275.1 mi → Nyurba447.8 km · 278.2 mi → Almaznyy452.1 km · 280.9 mi → Nyurbinsky453.3 km · 281.7 mi → Zhigansky480.0 km · 298.2 mi → Zhigansk485.4 km · 301.6 mi →

Abyysky68.33333, 146.00000 → Aldan58.61021, 125.39613 → Allaikhovskiy Rayon71.00000, 148.00000 → Almaznyy62.44917, 114.32778 → Amga60.90009, 131.97882 → Anabarskiy Rayon72.50000, 116.00000 →