Web PlanetariumPlanetarium / Sky calendar
Astronomy calendar 2026–2027Full moons, new moons, meteor showers, eclipses and planets
Upcoming sky events in date order, from the National Astronomical Observatory of Japan (NAOJ). Exact times are in UTC and in your own time zone. “See the sky” opens the planetarium for your place.
Next full moon Sat, Sep 26, 2026, 16:49 UTC: Full moon
Next new moon Sat, Oct 10, 2026, 15:50 UTC: New moon
Next meteor shower Thu, Oct 22, 2026 (JST): Orionids peak
Upcoming events
September 2026
-
Fri, Sep 25JST dateTsukimi Moon viewing in Japan: Chūshū no meigetsu (mid-autumn moon)Two days before the full moon (Sep 27) See the sky →Details
-
Sat, Sep 2616:49 UTC
October 2026
-
Sun, Oct 4JST datePlanet Saturn at oppositionUp all night, and at its brightest and largest for the year See the sky →Details
-
Sat, Oct 1015:50 UTC
-
Mon, Oct 12JST datePlanet Mercury at greatest eastern elongationFarthest from the Sun in the evening sky, low in the west after sunset See the sky →Details
-
Thu, Oct 22JST dateMeteors Orionids peakUp to about 5–10 per hour (NAOJ, for dark skies in Japan). Moon at peak: 81% lit, waxing. See the sky →Details
-
Fri, Oct 23JST dateTsukimi Moon viewing in Japan: Jūsan-ya (13th-night moon) See the sky →Details
-
Mon, Oct 2604:12 UTC
November 2026
-
Fri, Nov 6JST dateMeteors Southern Taurids peakUp to about 2–3 per hour (NAOJ, for dark skies in Japan). Moon at peak: 10% lit, waning. See the sky →Details
-
Mon, Nov 907:02 UTC
-
Fri, Nov 13JST dateMeteors Northern Taurids peakUp to about 2 per hour (NAOJ, for dark skies in Japan). Moon at peak: 13% lit, waxing. See the sky →Details
-
Wed, Nov 1800:00 UTC (approx.)Meteors Leonids peakYour time: Up to about 5 per hour (NAOJ, for dark skies in Japan). Moon at peak: 55% lit, waxing. See the sky →Details
-
Sat, Nov 21JST datePlanet Mercury at greatest western elongationFarthest from the Sun in the morning sky, low in the east before sunrise See the sky →Details
-
Tue, Nov 2414:54 UTC
-
Mon, Nov 30JST date
December 2026
-
Wed, Dec 900:52 UTC
-
Mon, Dec 1414:00 UTC (approx.)Meteors Geminids peakYour time: Up to about 60 per hour (NAOJ, for dark skies in Japan). Moon at peak: 25% lit, waxing. See the sky →Details
-
Thu, Dec 2401:28 UTC
January 2027
-
Mon, Jan 4JST datePlanet Venus at greatest western elongationFarthest from the Sun in the morning sky, low in the east before sunrise See the sky →Details
-
Mon, Jan 403:00 UTC (approx.)Meteors Quadrantids peakYour time: Up to about 15–20 per hour (NAOJ, for dark skies in Japan). Moon at peak: 12% lit, waning. See the sky →Details
-
Thu, Jan 720:24 UTC
-
Fri, Jan 2212:17 UTC
February 2027
-
Wed, Feb 3JST datePlanet Mercury at greatest eastern elongationFarthest from the Sun in the evening sky, low in the west after sunset See the sky →Details
-
Sat, Feb 615:56 UTC
-
Feb 6–7JST date
-
Thu, Feb 11JST datePlanet Jupiter at oppositionUp all night, and at its brightest and largest for the year See the sky →Details
-
Sat, Feb 20JST datePlanet Mars at oppositionUp all night, and at its brightest and largest for the year. Closest to Earth the same day See the sky →Details
-
Sat, Feb 2023:24 UTC
March 2027
-
Mon, Mar 809:29 UTC
-
Wed, Mar 17JST datePlanet Mercury at greatest western elongationFarthest from the Sun in the morning sky, low in the east before sunrise See the sky →Details
-
Mon, Mar 2210:44 UTC
April 2027
-
Tue, Apr 623:51 UTC
-
Tue, Apr 2022:27 UTC
-
Fri, Apr 2302:00 UTC (approx.)Meteors Lyrids peakYour time: Up to about 5 per hour (NAOJ, for dark skies in Japan). Moon at peak: 95% lit, waning. See the sky →Details
May 2027
-
Thu, May 610:59 UTC
-
Thu, May 615:00 UTC (approx.)Meteors Eta Aquariids peakYour time: Up to about 5–10 per hour (NAOJ, for dark skies in Japan). Moon at peak: 0% lit. See the sky →Details
-
Thu, May 2010:59 UTC
-
Fri, May 28JST datePlanet Mercury at greatest eastern elongationFarthest from the Sun in the evening sky, low in the west after sunset See the sky →Details
June 2027
-
Fri, Jun 419:40 UTC
-
Sat, Jun 1900:44 UTC
July 2027
-
Sun, Jul 403:02 UTC
-
Fri, Jul 16JST datePlanet Mercury at greatest western elongationFarthest from the Sun in the morning sky, low in the east before sunrise See the sky →Details
-
Sun, Jul 1815:45 UTC
August 2027
-
Sun, Aug 1JST dateMeteors Southern Delta Aquariids peakUp to about 5 per hour (NAOJ, for dark skies in Japan). Moon at peak: 3% lit. See the sky →Details
-
Mon, Aug 2JST date
-
Mon, Aug 210:05 UTC
-
Fri, Aug 1308:00 UTC (approx.)Meteors Perseids peakYour time: Up to about 35 per hour (NAOJ, for dark skies in Japan). Moon at peak: 86% lit, waxing. See the sky →Details
-
Tue, Aug 1707:29 UTC
-
Tue, Aug 3117:41 UTC
September 2027
-
Wed, Sep 15JST dateTsukimi Moon viewing in Japan: Chūshū no meigetsu (mid-autumn moon)The full moon is the next day (Sep 16) See the sky →Details
-
Wed, Sep 1523:04 UTC
-
Sat, Sep 25JST datePlanet Mercury at greatest eastern elongationFarthest from the Sun in the evening sky, low in the west after sunset See the sky →Details
-
Thu, Sep 3002:36 UTC
October 2027
-
Fri, Oct 1513:47 UTC
-
Mon, Oct 18JST datePlanet Saturn at oppositionUp all night, and at its brightest and largest for the year See the sky →Details
-
Fri, Oct 22JST dateMeteors Orionids peakUp to about 3–5 per hour (NAOJ, for dark skies in Japan). Moon at peak: 57% lit, waning. See the sky →Details
-
Fri, Oct 2913:37 UTC
November 2027
-
Thu, Nov 4JST datePlanet Mercury at greatest western elongationFarthest from the Sun in the morning sky, low in the east before sunrise See the sky →Details
-
Sat, Nov 6JST dateMeteors Southern Taurids peakUp to about 3–4 per hour (NAOJ, for dark skies in Japan). Moon at peak: 48% lit, waxing. See the sky →Details
-
Sat, Nov 13JST dateMeteors Northern Taurids peakUp to about 1–2 per hour (NAOJ, for dark skies in Japan). Moon at peak: 99% lit. See the sky →Details
-
Sun, Nov 1403:26 UTC
-
Thu, Nov 1806:00 UTC (approx.)Meteors Leonids peakYour time: Up to about 3–5 per hour (NAOJ, for dark skies in Japan). Moon at peak: 80% lit, waning. See the sky →Details
-
Sun, Nov 2803:24 UTC
December 2027
-
Mon, Dec 1316:09 UTC
-
Tue, Dec 1420:00 UTC (approx.)Meteors Geminids peakYour time: Up to about 25 per hour (NAOJ, for dark skies in Japan). Moon at peak: 98% lit. See the sky →Details
-
Mon, Dec 2720:12 UTC
Dates marked JST are Japan dates (UTC+9); in the Americas and Europe the same event may fall on the previous day. Events after 2027 are added once NAOJ publishes them (each February for the next year).
Sources
- NAOJ, mid-autumn moon, September 2026 (in Japanese)
- NAOJ Calendar and Ephemeris Office, Rekiyōkō 2026: new and full moons (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), October 2026 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), November 2026 (in Japanese)
- NAOJ, Geminids, December 2026 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), December 2026 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), January 2027 (in Japanese)
- NAOJ, Quadrantids, January 2027 (in Japanese)
- NAOJ Calendar and Ephemeris Office, Rekiyōkō 2027: new and full moons (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), February 2027 (in Japanese)
- NAOJ Calendar and Ephemeris Office, Rekiyōkō 2027: eclipses (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), March 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), April 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), May 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), July 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), August 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), September 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), October 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), November 2027 (in Japanese)
- NAOJ, sky guide (Hoshizora Jōhō), December 2027 (in Japanese)
Credit: National Astronomical Observatory of Japan (NAOJ). Dates and times are from NAOJ, checked on 2026-09-23. NAOJ bases meteor shower peaks on predictions by the International Meteor Organization (IMO). Moon illumination, radiant heights and the “See the sky” times are calculated by this site.