OBSERVATORY ALMANAC · NOCTURNAL DISPATCH

Tonight under the Sky

42.47°N, 140.87°EAsia/Tokyo

Deep Astronomical Night-44.1° (< −18°)

01:55:23

Sat, Oct 24, 2026

PHOTOMETRIC TWILIGHT SPECTRUM10h 9m of true darkness · 13h 17m total night

DaylightCivil (−6°)Nautical (−12°)Astro (−18°)Dark Sky (<−18°)

TRUE DARK SKY WINDOW

Sunset16:42

Civil Dusk17:11

Nautical17:44

Full Dark18:16

Nadir23:21

Dark Ends04:25

Nautical04:57

Civil Dawn05:30

Sunrise05:59

LIVE REAL-TIME OBSERVATION

SunsetSunrise

LOCAL SKY PLANISPHERE · STEREOGRAPHIC PROJECTION

All-Sky Nocturnal Dome

Click any body to inspect telemetry

LUNAR EPHEMERISWaxing Gibbous

ILLUMINATION92%

ALTITUDE15.4°

DISTANCE380,216 km

Moonrise15:03

Moonset03:27

HorizonAbove

LUNAR INTERFERENCE INDEX24% · Minimal Lunar Glare

Sky background remains dark; faint nebulae and distant galaxies are distinct.

ATMOSPHERIC SEEING & CLOUD PROFILETonight's Index

83/100

Good Stargazing

Fine observing conditions. Open star clusters and nebulae will exhibit crisp structure.

CLOUD COVER15%

HUMIDITY50%

VISIBILITY18 km

DEW POINT10.8°C

PLANETARY EPHEMERIS & ALMANAC

Visible Planets Tonight

All times calibrated to Asia/Tokyo

PLANET	STATUS	MAGNITUDE	ALTITUDE	AZIMUTH	CONSTELLATION	RISE	TRANSIT	SET	EQUIPMENT
Venus♀	Below Horizon	-4.3	-47.7°	67°	Libra	06:18	11:11	16:09	Naked Eye
Jupiter♃	Visible Low	-2.0	17.8°	86°	Leo	00:13	07:10	14:10	Naked Eye
Saturn♄	Visible Low	0.3	24.9°	247°	Pisces	16:01	22:09	04:16	Naked Eye
Mars♂	Visible Low	1.0	26.3°	89°	Cancer	23:24	06:36	13:47	Naked Eye
Mercury☿	Below Horizon	0.4	-62.9°	43°	Libra	07:56	12:37	17:21	Binoculars
Uranus♅	Optimal Visibility	5.6	68.3°	190°	Taurus	18:15	01:40	09:04	Binoculars
Neptune♆	Visible Low	7.8	18.5°	252°	Pisces	15:38	21:39	03:39	Telescope

TONIGHT'S VIEWING SCHEDULE

When & Where to Look Tonight

A simple guide to when each object is above your horizon. No astronomy chart reading required.

BEST TIMEHighest in your sky

The MoonNaked Eye · High in the sky

RISES15:03

BEST TIME21:09S · 47° high

SETS03:27

Reaches about 47° above the horizon at its highest point.Waxing Gibbous (92% illuminated). Minimal Lunar Glare.

JupiterNaked Eye · High in the sky

RISES00:13

BEST TIME07:10S · 62° high

SETS14:10

Reaches about 62° above the horizon at its highest point.Bright golden disc; four Galilean moons easily seen in 7x50 binoculars.

SaturnNaked Eye · High in the sky

RISES16:01

BEST TIME22:09S · 49° high

SETS04:16

Reaches about 49° above the horizon at its highest point.Pale amber jewel; majestic ring system visible in any 60mm telescope.

VenusNaked Eye · Good height

RISES06:18

BEST TIME11:11S · 30° high

SETS16:09

Reaches about 30° above the horizon at its highest point.Brilliant dazzling beacon; visible crescent phase in small telescope.

MarsNaked Eye · High in the sky

RISES23:24

BEST TIME06:36S · 65° high

SETS13:47

Reaches about 65° above the horizon at its highest point.Distinctive crimson hue; polar ice cap discernible near opposition.

OBSERVING LOG & TARGET LIST

Tonight's Prime Deep-Sky Targets

0 / 6 targets logged tonight

M31 / NGC 224 · Andromeda

Andromeda Galaxy

Spiral Galaxy (2.5M ly)

Our galactic neighbor; visible as a ghostly oval smudge with dense radiant stellar core.

M45 · Taurus

The Pleiades (Seven Sisters)

Open Star Cluster

Breathtaking blue diamond cluster enshrouded in delicate interstellar reflection nebulosity.

M42 / NGC 1976 · Orion

Great Orion Nebula

Diffuse Emission Nebula

Star nursery harboring the brilliant Trapezium cluster with sprawling bat-wing filaments.

NGC 869 & NGC 884 · Perseus

The Double Cluster

Twin Open Clusters

Pair of spectacular shimmering jewel-boxes bursting with ruby supergiant stars.

M13 / NGC 6205 · Hercules

Great Globular Cluster in Hercules

Globular Cluster (300k stars)

Massive beehive of ancient stars packed tightly together into a blazing central ball.

M57 / NGC 6720 · Lyra

The Ring Nebula

Planetary Nebula

Delicate glowing smoke-ring left behind by a dying star 2,500 light-years away.