DE405 Lunar Ephemeris Calculator
Spanning the 600-Year Period From 1600 to 2200 on the Modern Gregorian Calendar
PHP Program by Jay Tanner - Based on the NASA/JPL DE405 Ephemeris Model
Calendar Date
Year / Month / Day
Time
hh:mm:ss
Date/Time Mode
LT | UT | TT
Local Time Zone Offset From UT
±hh:mm (Neg/Pos = West/East)
Local Time (
LT
) =
UT
Default Location:
America/New_York
- Your Local Latitude, Lonitude and Time Zone May be Different
Geographic Location Used For Local Topocentric Computations
332.2832 deg
Latitude
Deg.ddd or DMS (Neg=S)
Longitude
Deg.ddd or DMS (Neg=W)
Sea-Level Elevation
meters
QUICK DE405 LUNAR EPHEMERIS STATISTICS ---------------------------- DATE/TIME/MODE/ZONE/LOCATION Date = 2025 Aug 20 Wed Time = 20:09:40 LT Time Zone = UT-04:00 Delta T = +00:01:15 Latitude = +42.6764593 deg N = +42° 40' 35.25" Longitude = -76.8230111 deg W = -76° 49' 22.84" = -05h 07m 17.52s Elevation = +0.0 m JD TT = 2460908.50758103 = Working Julian Date on TT scale Phase Angle = 332.2832 deg Visual Phase = Waning crescent, approaching new moon Horizon Altitude = -11.011° BELOW local horizon - Descending in NW Direction Azimuth = 316.232° = NW (N=0, E=90, S=180, W=270) ====================================================================== TIME LT LOCAL BASIC EVENTS SCHEDULE FOR DATE -------- ------------------------------------ 02:56 Moonrise - Waning crescent, approaching new moon 06:20 Sunrise 18:56 Moonset 20:01 Sunset ====================================================================== GEOCENTRIC LUNAR COORDINATES AND DISTANCE Right Ascension = 08h 14m 27.825s = 8.2410625 h = 123.6159375° Declination = +23° 50' 35.81" = +23.843280° Distance = 235612.583 mi = 379181.696 km Angular Diameter = 31' 30.95" = 31.51579' = 1890.95" = 0.5252632° Eq. Horiz. Parallax = 57' 49.70" = 0.9638060° = 57.82836' = 3469.70" Local Hour Angle = +08h 47m 28.46s = +8.7912397 h = +131.8685960° ----------------------------- TOPOCENTRIC LUNAR COORDINATES Right Ascension = 08h 12m 10.408s = 8.2028912 h = 123.0433680° Declination = +23° 03' 31.39" = +23.058718° Radial Velocity = +127.77 km/h = +79.39 mi/h = Receding from Earth Orbital Velocity = 3742.97 km/h = 2325.78 mi/h AUGUST 2025 - Lunar Quarter Phases, Apogees and Perigees For Time Zone UT-04:00 Applied NASA Delta T = +00:01:15 Date and Time LT Lunar Event --------------------- ----------------------------------- 2025 Aug 01 Fri 08:41 First Quarter Moon = Phase 90 2025 Aug 01 Fri 16:36 Apogee 251134.22 mi = 404161.35 km 2025 Aug 09 Sat 03:55 Full Moon = Phase 180 2025 Aug 14 Thu 13:59 Perigee 229465.10 mi = 369288.28 km 2025 Aug 16 Sat 01:12 Last Quarter Moon = Phase 270 2025 Aug 23 Sat 02:06 New Moon = Phase 0/360 2025 Aug 29 Fri 11:34 Apogee 251374.34 mi = 404547.78 km 2025 Aug 31 Sun 02:25 First Quarter Moon = Phase 90 There are two first quarter moons in August of 2025 LT. There are also two lunar apogees in August of 2025 LT.
EXTENDED DE405 LUNAR EPHEMERIS STATISTICS AND HOURLY TABLE Time Mode = LT Time Zone = UT-04:00 ---------------------------------------------------------- CALENDAR DATE TIME JULIAN DATE JD NUMBER --------------- ----------- ---------------- ----------- 2025 Aug 20 Wed 20:09:40 LT 2460908.34004630 2460908 LT -04:00:00 TZ -0.16666667 2025 Aug 21 Thu 00:09:40 UT 2460908.50671297 2460909 UT +00:01:15 dT +0.00086806 2025 Aug 21 Thu 00:10:55 TT 2460908.50758103 2460909 TT JD TT = 2460908.50758103 = Working Julian Date on TT scale Latitude = +42.6764593 deg N = +42° 40' 35.25" Longitude = -76.8230111 deg W = -76° 49' 22.84" = -05h 07m 17.52s Elevation = +0.0 m ----------- EARTH GEOID ρ × sin(φ') = +0.6743577407 ρ × cos(φ') = +0.7363265249 ---------------------- APPARENT SIDEREAL TIME Greenwich 22h 09m 13.81s = 22.1538363 h = 332.3075449 deg Local 17h 01m 56.29s = 17.0323023 h = 255.4845338 deg ================================================================= LUNAR POSITION, DISTANCE, PHASE AND LOCAL SUN/MOON RISE/SET TIMES Date = 2025 Aug 20 Wed Time = 20:09:40 LT Time Zone = UT-04:00 Delta T = +00:01:15 JD TT = 2460908.50758103 GEOGRAPHIC LOCATION Latitude = +42.6764593 deg N = +42° 40' 35.25" Longitude = -76.8230111 deg W = -76° 49' 22.84" = -05h 07m 17.52s Elevation = +0.0 m GEOCENTRIC LUNAR COORDINATES Right Ascension = 08h 14m 27.825s = 8.2410625 h = 123.6159375° Declination = +23° 50' 35.81" = +23.843280° Distance = 235612.583 mi = 379181.696 km Phase Angle = 332.28324° Visual Phase = Waning crescent, approaching new moon Angular Diameter = 31' 30.95" = 31.51579' = 1890.95" = 0.5252632° Eq. Horiz. Parallax = 57' 49.70" = 0.9638060° = 57.82836' = 3469.70" Radial Velocity = +127.77 km/h = +79.39 mi/h = Receding from Earth Orbital Velocity = 3742.97 km/h = 2325.78 mi/h TOPOCENTRIC LUNAR COORDINATES Right Ascension = 08h 12m 10.408s = 8.2028912 h = 123.0433680° Declination = +23° 03' 31.39" = +23.058718° Horizon Altitude = -11.011° BELOW local horizon - Descending in NW Direction Azimuth = 316.232° = NW (N=0, E=90, S=180, W=270) Local Hour Angle = +08h 47m 28.46s = +8.7912397 h = +131.8685960° Light Time = 1.2378 sec = 1-way surface-to-surface = 2.4756 sec = 2-way surface-to-surface -------- ------------------------------------------------ TIME LT LOCAL EVENTS SCHEDULE FOR DATE 02:56 Moonrise - Waning crescent, approaching new moon 06:20 Sunrise 18:56 Moonset 20:01 Sunset ----------------------------------------------------------------- HOURLY GEOCENTRIC LUNAR COORDINATES, DISTANCE AND PHASE EPHEMERIS DATE = 2025 Aug 20 Wed LT TZ = UT-04:00 = Time Zone Offset From UT (Neg/Pos = West/East) dT = +00:01:15 = NASA Delta T estimate Table Origin for 00:00:00 LT of date = 2460907.66753473 TT LT hh RA Hrs Decl Deg Dist Km Dist Mi Phase Deg -- ---------- ---------- ---------- ---------- --------- -3 7.2941278 +26.870659 376439.114 233908.421 320.0152 -2 7.3362037 +26.768414 376548.408 233976.333 320.5488 -1 7.3781815 +26.663430 376658.534 234044.762 321.0821 00 7.4200595 +26.555731 376769.492 234113.708 321.6150 01 7.4618364 +26.445338 376881.281 234183.171 322.1476 02 7.5035104 +26.332276 376993.899 234253.148 322.6799 03 7.5450801 +26.216567 377107.347 234323.642 323.2118 04 7.5865443 +26.098236 377221.622 234394.649 323.7433 05 7.6279015 +25.977306 377336.724 234466.170 324.2745 06 7.6691504 +25.853803 377452.651 234538.204 324.8054 07 7.7102900 +25.727751 377569.401 234610.749 325.3359 08 7.7513189 +25.599174 377686.973 234683.805 325.8660 09 7.7922359 +25.468098 377805.365 234757.370 326.3958 10 7.8330402 +25.334548 377924.574 234831.443 326.9252 11 7.8737308 +25.198550 378044.600 234906.024 327.4542 12 7.9143065 +25.060131 378165.439 234981.110 327.9829 13 7.9547668 +24.919315 378287.089 235056.699 328.5112 14 7.9951106 +24.776130 378409.549 235132.793 329.0391 15 8.0353372 +24.630602 378532.813 235209.385 329.5666 16 8.0754459 +24.482758 378656.881 235286.478 330.0938 17 8.1154360 +24.332623 378781.749 235364.067 330.6206 18 8.1553068 +24.180227 378907.414 235442.152 331.1470 19 8.1950580 +24.025594 379033.873 235520.730 331.6730 20 8.2346889 +23.868753 379161.121 235599.798 332.1986 21 8.2741988 +23.709731 379289.156 235679.355 332.7238 22 8.3135878 +23.548554 379417.973 235759.398 333.2486 23 8.3528552 +23.385252 379547.569 235839.925 333.7731 24 8.3920008 +23.219851 379677.939 235920.934 334.2971 25 8.4310244 +23.052378 379809.079 236002.420 334.8207 26 8.4699257 +22.882862 379940.985 236084.383 335.3440 27 8.5087045 +22.711331 380073.651 236166.818 335.8668 28 8.5473609 +22.537811 380207.074 236249.723 336.3892 ======================================================================
DE405 Lunar Ephemeris Calculator - v3.0 - A PHP Astronomy Program by Jay Tanner
Revised:
2023 March 06 at 07:54:25 PM Monday