What is the moon phase tonight in Seoel?

Tonight's moon phase for Seoel is displayed in real time on MoonSync. The page loads with Seoel's coordinates (37.6°, 127.0°) and shows the current moon illumination percentage, lunar age (days since new moon), moonrise and moonset times, and the moon's position above Seoel's horizon. All calculations run client-side — no location data is sent anywhere.

When is the next full moon visible from Seoel?

MoonSync's lunar calendar shows the full moon phase progression for any date and location, including Seoel. Full moons occur approximately every 29.53 days. At 37.6° latitude, full moons near the winter solstice rise at their highest point in Seoel's sky, while full moons near the summer solstice stay lower on the horizon — this seasonal variation is why winter full moons appear more dramatic from Seoel.

How does the moon's phase affect stargazing in Seoel?

Moon phase is the single most important factor for stargazing quality at Seoel. A full moon (100% illumination) brightens the sky enough to obscure all but the brightest stars and makes deep-sky observation nearly impossible. For the best stargazing in Seoel, plan sessions during the 7 days around New Moon when illumination is below 15%. Use MoonSync to find the next New Moon date, then use the Twilight Calculator to check when astronomical darkness begins.

Why does moonrise time change each day in Seoel?

The moon rises approximately 50 minutes later each day as seen from Seoel because the moon orbits Earth at about 1 km/s, moving approximately 13° eastward per day against the background stars. Since Earth rotates 360° in 24 hours (15°/hour), the extra 13° of rotation takes roughly 50 minutes. This daily delay explains why the moon is sometimes visible in Seoel's daytime sky and why moonrise can occur at any hour of the day or night.

Moon data for Seoel

Moon Phase & Moonrise Times Seoel — MoonSync · FastTool

How Moon Phases Work at Seoel's Latitude

Moon Phases Visible from Seoel

From Seoel at latitude 37.6°, the moon's appearance follows the same 29.53-day synodic cycle visible worldwide — all 8 phases from New Moon through Full Moon and back. However, Seoel's mid-latitude latitude affects the moon's maximum altitude in the sky. The moon can reach up to 81.0° altitude when crossing the meridian near summer solstice, and only 23.8° near winter solstice. This seasonal variation determines how high the moon appears above Seoel's horizon and affects lunar photography planning.

NASA Moon Phase Reference

Moonrise & Moonset Times at Seoel

The moon rises approximately 50 minutes later each day as seen from Seoel. This daily delay occurs because the moon orbits Earth eastward at about 1 km/s, moving roughly 13° per day against the background stars. At Seoel's latitude (37.6°), the moon's rise and set positions along the horizon shift seasonally — rising further north in summer and further south in winter. MoonSync calculates exact moonrise and moonset times for Seoel using real-time ephemeris data.

USNO Moonrise Data

Moon Illumination & Seoel's Dark-Sky Planning

For stargazing and astrophotography in Seoel, moon illumination percentage is the critical number. A Full Moon (100% illuminated) washes out all but the brightest stars and makes deep-sky observation nearly impossible. The 7 days around New Moon (0-15% illumination) provide the best dark-sky window. At 37.6° latitude, combine moon phase with the Twilight Calculator to find nights when both astronomical darkness and minimal moonlight coincide — these 'astrophotographer's golden hours' occur roughly once per month at Seoel.

IAU — Observing Conditions

Lunar Data Accuracy for Seoel

MoonSync computes moon phase, illumination, moonrise/moonset times, and lunar age for Seoel using real-time ephemeris data. Phase illumination is accurate to ±1%. Moonrise and moonset times are calculated from Seoel's precise coordinates (37.6°, 127.0°) and corrected for atmospheric refraction. The Keplerian orbital model used achieves timing accuracy of approximately ±30 minutes over a synodic month. For sub-minute lunar event timing, consult the USNO Phases of the Moon data service.

USNO Phases of the Moon

99%

Illumination

10:44

Moonrise

19:55

Moonset

Poor

Photo Window

MoonSync

MoonSync — Lunar Clock & Site Selector

Lunar Coordinated Time, selenographic site selector & Moon resident pass

Showing example data: Apollo 11 — Tranquility Base. Click the map or choose a preset to view your site.

Lunar Time (LTC)

Moon Coordinated Time

2026-06-29 03:52:05.323 LTC

Earth UTC

2026-06-29 03:52:04.781 UTC

Accumulated drift since page load

+0.000000 μs ahead of Earth

Lunar Calendar

Moon PhaseWaxing Gibbous

Days since new moon13.75 / 29.53

Cycle Progress46.5%

🌑 New🌕 Full🌑 New

Lunar Site Map

Lat: +0.7° Lon: +23.5°

Click anywhere on the map to select a lunar site

Preset Sites

Moon Illumination

99.2%

Phase: Waxing Gibbous

LIVE

Observer Location

Lat

Lng

Moonrise

10:44

Moonset

19:55

Moon is below the horizon

Illumination Status

Lighting State

Lunar Day

Until next sunset

10d 8h

Solar Position

Altitude

+54.1°

Azimuth

269.1°

Earth–Moon Distance

401.530kmLIVE

Earth Phase (from Moon)

Earth illumination

1.2%

Earth's illuminated fraction as seen from this lunar site.

Phase

New Earth

Environmental Insights

Surface Temperature Estimate

106.3°C

Based on Stefan-Boltzmann solar angle model. Range: −173°C to +127°C.

Solar Panel Output

Panel area (m²):

1102 W

Solar constant: 1,361 W/m²

Shadow Length (1 m object)

0.72 m

Moon Resident Pass

Coordinates

0.67°N, 23.47°E

LTC Timestamp

2026-06-29 03:52:05.323 LTC

Lighting

☀ Lunar Day

Surface Temp.

106.3°C

Badge

⚑ Lunar Archaeologist

Issued by MoonSync · fastool.io

Badge

Lunar Archaeologist

Solar Position & Twilight Calculator — Solar InsightCalculate solar altitude, azimuth, golden hour, and civil/nautical/astronomical twilight for any location on Earth.fastool.io Sidereal Time Calculator for AstronomersConvert between local sidereal time and UTC for telescope alignment and observation planning.fastool.io

How MoonSync Works

What Is Lunar Coordinated Time (LTC)?

LTC is a proposed Moon-based time standard. NASA's 2023 analysis found that Moon clocks gain +56.02 µs per Earth day: weaker lunar gravity causes a gravitational blueshift that outweighs the transverse Doppler redshift from lower orbital velocity. MoonSync accumulates this offset from J2000.0 (Jan 1, 2000 12:00 UTC).

NASA — What Time Is It on the Moon?

How Is Moon Illumination Percentage Calculated?

Moon illumination from Earth is the fraction of the Moon's visible disk lit by the Sun. At New Moon (0%), the Moon is between Earth and Sun, showing only its dark side. At Full Moon (100%), Earth is between Moon and Sun. The percentage follows a smooth sinusoidal curve over the 29.53-day synodic month. MoonSync calculates this in real-time using solar and lunar ephemeris data.

USNO — Moon Illumination Data

What Is a Permanent Shadow Region (PSR)?

PSRs are craters near the lunar poles never exposed to direct sunlight, due to the Moon's low axial tilt (1.54°). Temperatures hover around −230 °C, cold enough to trap water ice for billions of years. NASA's LCROSS mission (2009) confirmed water ice deposits in Cabeus crater near the south pole, making PSRs prime candidates for future lunar bases.

NASA Science — Permanently Shadowed Craters

How Is Earth–Moon Distance Calculated?

MoonSync uses a first-order Keplerian ellipse: r = a(1 − e·cos M), where a = 384,399 km (semi-major axis), e = 0.0549 (eccentricity), and M is the mean anomaly from perigee. Accuracy is ±3,000 km. For navigation-grade ephemerides, NASA/JPL's Horizons system integrates the full DE440 planetary solution.

JPL Horizons — Lunar Ephemeris

Frequently Asked Questions

What is Lunar Coordinated Time (LTC)?: LTC is a proposed Moon-based time standard. Because lunar gravity is weaker (gravitational blueshift) and the Moon's orbital speed is lower (transverse Doppler redshift), Moon clocks run approximately +56.02 µs faster per Earth day than Earth clocks. MoonSync cumulates this offset from J2000.0 (Jan 1, 2000, 12:00 UTC) to display the total LTC lead over UTC at any moment.
Why is the lunar surface temperature so extreme?: The Moon has no atmosphere to distribute or retain heat. In direct sunlight, temperatures reach +127 °C (400 K) at the sub-solar point; on the nightside they fall to −173 °C (100 K) — a 300 °C swing driven purely by the presence or absence of solar radiation. MoonSync estimates temperature using the Stefan–Boltzmann model: T (K) = 400 · sin(altitude)^0.25.
What is a Permanent Shadow Region (PSR)?: PSRs are polar craters on the Moon that have never received direct sunlight, due to the Moon's low axial tilt (1.54°). Temperatures can fall to −230 °C — cold enough to preserve water ice for billions of years. NASA's LCROSS mission (2009) confirmed water ice at the lunar south pole. MoonSync classifies any polar site (|lat| ≥ 87°) with negative solar altitude as a PSR.
How accurate are MoonSync's calculations?: MoonSync uses simplified Keplerian orbital elements and geometric optics suitable for education and illustration — not for navigation. Earth–Moon distance accuracy is ±3,000 km; LTC offset uses NASA's 2023 value of +56.0205 µs/day; phase timing drifts ≈±30 min over a synodic month. For navigation-grade results, consult JPL Horizons or USNO data.
When will the moon rise and set at my location?: MoonSync calculates moonrise and moonset times using your browser's location (or manually entered coordinates). The Moon rises roughly 50 minutes later each day due to its eastward orbital motion. Moonrise/moonset times depend on your latitude, the Moon's declination, and the current lunar phase. MoonSync uses real-time ephemeris data to compute accurate rise/set times and shows whether the Moon is currently above or below your horizon.

Frequently Asked Questions About Moon Data in Seoel

What is the moon phase tonight in Seoel?: Tonight's moon phase for Seoel is displayed in real time on MoonSync. The page loads with Seoel's coordinates (37.6°, 127.0°) and shows the current moon illumination percentage, lunar age (days since new moon), moonrise and moonset times, and the moon's position above Seoel's horizon. All calculations run client-side — no location data is sent anywhere.
When is the next full moon visible from Seoel?: MoonSync's lunar calendar shows the full moon phase progression for any date and location, including Seoel. Full moons occur approximately every 29.53 days. At 37.6° latitude, full moons near the winter solstice rise at their highest point in Seoel's sky, while full moons near the summer solstice stay lower on the horizon — this seasonal variation is why winter full moons appear more dramatic from Seoel.
How does the moon's phase affect stargazing in Seoel?: Moon phase is the single most important factor for stargazing quality at Seoel. A full moon (100% illumination) brightens the sky enough to obscure all but the brightest stars and makes deep-sky observation nearly impossible. For the best stargazing in Seoel, plan sessions during the 7 days around New Moon when illumination is below 15%. Use MoonSync to find the next New Moon date, then use the Twilight Calculator to check when astronomical darkness begins.
Why does moonrise time change each day in Seoel?: The moon rises approximately 50 minutes later each day as seen from Seoel because the moon orbits Earth at about 1 km/s, moving approximately 13° eastward per day against the background stars. Since Earth rotates 360° in 24 hours (15°/hour), the extra 13° of rotation takes roughly 50 minutes. This daily delay explains why the moon is sometimes visible in Seoel's daytime sky and why moonrise can occur at any hour of the day or night.

30-Day Observation Planner

Date	Sunrise	Sunset	Twilight End	Moon Illum.	Dark Window
Jun 29Today	20:14	10:58	12:08	100%	6h 56m
Jun 30	20:14	10:58	12:08	100%	6h 56m
Jul 1	20:15	10:58	12:08	98%	6h 57m
Jul 2	20:15	10:58	12:08	94%	6h 58m
Jul 3	20:16	10:58	12:08	89%	6h 58m
Jul 4	20:16	10:58	12:07	82%	6h 59m
Jul 5	20:17	10:58	12:07	73%	7h
Jul 6	20:17	10:57	12:07	63%	7h 1m
Jul 7	20:18	10:57	12:06	52%	7h 2m
Jul 8	20:18	10:57	12:06	41%	7h 3m
Jul 9	20:19	10:57	12:06	30%	7h 4m
Jul 10	20:20	10:56	12:05	20%	7h 6m
Jul 11	20:20	10:56	12:05	11%	7h 7m
Jul 12	20:21	10:56	12:04	5%	7h 8m
Jul 13	20:22	10:55	12:04	1%	7h 10m
Jul 14	20:22	10:55	12:03	0%	7h 11m
Jul 15	20:23	10:54	12:02	2%	7h 13m
Jul 16	20:24	10:54	12:02	6%	7h 14m
Jul 17	20:24	10:53	12:01	13%	7h 16m
Jul 18	20:25	10:53	12:00	21%	7h 17m
Jul 19	20:26	10:52	11:59	30%	7h 19m
Jul 20	20:27	10:52	11:59	40%	7h 21m
Jul 21	20:27	10:51	11:58	50%	7h 23m
Jul 22	20:28	10:50	11:57	60%	7h 25m
Jul 23	20:29	10:50	11:56	69%	7h 26m
Jul 24	20:30	10:49	11:55	78%	7h 28m
Jul 25	20:30	10:48	11:54	85%	7h 30m
Jul 26	20:31	10:47	11:53	91%	7h 32m
Jul 27	20:32	10:47	11:52	96%	7h 34m
Jul 28	20:33	10:46	11:51	99%	7h 36m