2MASS6X color J (1.23um) & K (2.16um) survey collection

During the final months of 2MASS observatory operations, a campaign of targeted "long exposure" observations was carried out during times when no previously unscanned parts of...在2MASS天文台运行的最后数月期间，科研团队于所有区域均已被此前巡天扫描覆盖的时段内，开展了靶向“长曝光”观测计划。