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SIGHT REDUCTION PAGE

Today's Date and GMT:
April 23, 2018    11:09:22

DATE:

GMT: : :
Nav Body:
Assumed Lat: '
Assumed Lon: '
Sextant altitude Hs: '

Height of observer:   Air temp:
Water temp:
Barometric P (PSI or mbs):

Local Noon (GMT):16:51:40

Sunrise (GMT): 10:02:01

Sunset (GMT): 23:42:02

GHA Aries: W 18 47.3'

Equation of Time: 1min40sec

More Results

GHA
Declination
RA
LHA
S.D.
Zn
Hc
Ho

Meridian

crossing

     SUN
347 45.5'
N 12 35.7'
02h04m07s
274 25.2'
15.9 '
83.3
11 33.0'
-0 17.8' 16:51:41
   MOON
245 48.3'
N 17 31.9'
08h51m56s
172 28.0'
16.1'
351.6
-30 51.5'
0 41.3' 23:39:30
  VENUS
322 38.6'
N 20 19.6'
03h44m34s
249 18.3'
5.6"
61.3
-1 10.7'
-0 33.7' 18:32:08
   MARS
87 10.6'
S 22 59.1'
19h26m27s
13 50.3'
5.2"
194
24 32.8'
-0 33.6' 10:14:01
JUPITER
150 35.5'
S 16 35.0'
15h12m47s
77 15.2'
22.2"
249.3
-1 39.2'
-0 33.8' 06:00:21
SATURN
98 55.4'
S 22 14.2'
18h39m27s
25 35.1'
8.7"
205.6
22 16.2'
-0 33.8'
09:27:01
Acamar
334 02.9'
S 40 13.9'
02h58m57s
260 42.6'
0"
118.3
-31 12.4'
-0 33.8'
17:46:31

SIGHT REDUCTIONS

The results above correspond to data found in the Nautical Almanac with an accuracy of   ± 0.1 minute.
Fill in all boxes in the Data Form at left. If you have more than 2 sight reductions, you can calculate a fix by selecting the 2 sight reductions you want to use. All calcuations on this page (and the popups) are based on the data submitted in the form.

Program written by M. Smith based on algorithms from "Astronomical Algorithms", by Jean Meeus

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More Astronomical Info

Day of Year = 113
Julian Date JD = 2458231.964838
JD Ephemeris= 2458231.9658893
Sun-Earth distance = 1.01 AU = 150415784 km = 93464035 mi
Earth-Moon distance = 371218 km = 230664 mi
Earth-Venus distance = 1.49 AU = 222410085 km = 138199220 mi
Earth-Mars distance = 0.91 AU = 135882611 km = 84433540 mi
Earth-Jupiter distance = 4.44 AU = 664706919 km = 413029731 mi
Earth-Saturn distance = 9.61 AU = 1438173575 km = 893639628 mi
Day = 23.464837962963
UT = 11.156111111111hours
deltaT=90.83972seconds
TD = 11.181344366667
hours JD = 2458231.964838
JDE= 2458231.9658893
t corrector = 0.055518568417061
corrected JDE= 2458231.9103708
DOY = 113
T (from JD) = 0.18307911945141
T (from JDE = 0.18307914823679
tau (from JDE) = 0.018307914823679
corrected taue = 0.018307762822122
SHA theta = 18.791578978766
nutation in longitude delta Rho = -14.151059229544
nutation of the ecliptic = -5.7795165416393 obliquity of the ecliptic = 23.43530489569
earth l = 213.26042729206
earth r = 1.0054665449756
earth b = 5.8817123136044E-5
222.97364148902
Lnot=31.456742803277
epsilon= 23.43530489569
alpha=31.02963340269 nutation in longitude=-14.151059229544
equation of time E=00:01:40