Area around LS 5039 and PSR J1825−1446 in Galactic coordinates. The lines mark the past trajectory in the last 10⁶ yr for LS 5039, and 1.95 × 10⁵ yr for PSR J1825−1446. The green circles are supernova remnants from the catalogue compiled in Green (2009). The red circles are open clusters from the WEBDA database, and the blue ellipses mark the position of the known OB associations (Mel’Nik & Efremov 1995). The OB stars (Reed 2003) and the star-forming regions (Avedisova 2002) are marked with blue and grey dots, respectively, and provide a general view of the young system distribution in this region of the Galaxy. The red crosses mark the H ii regions (Lockman 1989). The objects in regions #1, #2, and #3 are described in the text.