LDN 1798 — midnight transit date and best time to observe

Object data

A Lynds dark nebula in Sagittarius. Opacity class 4 (1 = faintest to 6 = darkest).

Location: Tokyo (change)

🗓️

Around Jun 18, 2026

The date it transits around midnight (transit altitude about 23°)

This date has already passed this year. Next year (2027) it will be around Jun 19.

For about 2–3 weeks either side of this date, the object stays high from evening to dawn — its observing season.

Tomorrow night (Oct 17 evening – Oct 18 dawn) · Location: Tokyo (full darkness = end of astronomical dusk to start of dawn, altitude ≥ 15°)

There is no good time left tonight, so the next chance — tomorrow night (Oct 17 evening – Oct 18 dawn) — is shown.

🌒 Moon tonight: Waxing crescent (age 5.6 days, 31% illuminated)

It does not reach 15° during full darkness tonight (it is high only in daytime or twilight at this time of year).

Night (sunset – sunrise) Full darkness (dusk – dawn) Moon up (darker = brighter moon) Best time to observe (thick line) Now

Sunset 17:03 → Dusk 18:28 → Dawn 4:24 → Sunrise 5:49

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