mun Sipunsun 2-18

li mun loje pi suli mute lon .suno li wile tawa mun Sipunsun 2-18 tan mun mi la,ona li kepeken tenpo sike 20000.kulupu mun Sipunsun pi kulupu mute ala la ona li lon poka.Davies, B.; Figer, D. F.; Kudritzki, R. P.; MacKenty, J.; Najarro, F.; Herrero, A. A Massive Cluster of Red Supergiants at the Base of the Scutum‐Crux Arm. The Astrophysical Journal. 2007, 671 (1): 781–801.

 sona ona 
ona li mun sona pi suli nanpa wan.linja pi meso sike li tu li lanpan e wan la,linja ona li linja suno 2158.[5]Fok, Thomas K. T; Nakashima, Jun-ichi; Yung, Bosco H. K; Hsia, Chih-Hao; Deguchi, Shuji. Maser Observations of Westerlund 1 and Comprehensive Considerations on Maser Properties of Red Supergiants Associated with Massive Clusters. The Astrophysical Journal. 2012, 760 (1): 65.ken la   ona li seli Kewin 3,200.suno pi suno mi 440,000 li suno ona.[5]Fok, Thomas K. T; Nakashima, Jun-ichi; Yung, Bosco H. K; Hsia, Chih-Hao; Deguchi, Shuji. Maser Observations of Westerlund 1 and Comprehensive Considerations on Maser Properties of Red Supergiants Associated with Massive Clusters. The Astrophysical Journal. 2012, 760 (1): 65. Bibcode:2012ApJ

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