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Astronomical seeing San Pedro de Atacama

Limited 3 Days Seeing Prediction

You can subscribe to an ad-free extended seven day seeing prediction with point+:

Datetime Clouds Seeing Bad Layers
Sun & Moon phases Hour CLT Low Mid High Index 1 Index 2 arc sec. Visible Planets Jet stream (m/s) Bot (km) Top (km) K/ 100m Temp (°C) 2m rel. hum. (%)
Fri
2014.04.18
20 0 0 0 5 5 0.29
---MJS---
33 m/s 00.0 00.0 0.0 K 7°C 11%
21 0 0 0 5 5 0.28
L--MJS---
33 m/s 04.4 05.1 0.5 K 12°C 12%
22 0 0 0 5 5 0.26
L--MJS---
33 m/s 04.4 05.1 0.5 K 10°C 14%
23 0 0 0 5 4 0.24
L--M-S---
34 m/s 04.4 05.1 0.5 K 9°C 18%
Sat
2014.04.19
06:49
18:14
22:06
10:47
waning gibbous (239°)
00 0 0 0 5 4 0.24
L--M-S--P
35 m/s 03.8 05.1 0.5 K 7°C 22%
01 0 0 0 5 4 0.24
L--M-S--P
35 m/s 03.8 04.4 0.5 K 6°C 25%
02 0 0 0 5 4 0.23
L--M-S--P
35 m/s 03.8 04.4 0.5 K 6°C 29%
03 0 0 0 5 4 0.23
L--M-S--P
35 m/s 03.8 04.4 0.6 K 5°C 31%
04 0 0 0 5 4 0.23
L-VM-S-NP
35 m/s 03.8 04.4 0.6 K 4°C 33%
05 0 0 0 5 4 0.22
L-VM-S-NP
35 m/s 03.7 04.4 0.6 K 3°C 35%
06 0 0 9 5 4 0.21
L-V--SUNP
35 m/s 03.7 04.4 0.6 K 1°C 36%
07 0 0 21 5 3 0.21
LMV--SUNP
35 m/s 03.8 04.4 0.6 K 1°C 39%
08 0 0 3 5 4 0.22
LMV--SUNP
34 m/s 03.8 04.4 0.6 K 5°C 39%
09 0 0 0 5 4 0.22
LMV---UNP
33 m/s 03.8 04.4 0.6 K 9°C 30%
10 0 0 0 5 4 0.22
-MV---UNP
33 m/s 03.8 04.4 0.5 K 12°C 26%
11 0 0 0 5 5 0.22
-MV---UNP
32 m/s 02.6 03.2 0.7 K 16°C 18%
12 0 0 0 5 5 0.21
-MV---UNP
32 m/s 00.0 00.0 0.0 K 19°C 15%
13 0 0 0 5 5 0.21
-MV-J-UN-
32 m/s 00.0 00.0 0.0 K 21°C 11%
14 0 0 0 5 5 0.20
-MV-J-UN-
33 m/s 00.0 00.0 0.0 K 22°C 9%
15 0 0 0 5 5 0.20
-MV-J-UN-
33 m/s 00.0 00.0 0.0 K 23°C 8%
16 0 0 0 5 5 0.21
-M--J-U--
33 m/s 00.0 00.0 0.0 K 23°C 7%
17 0 0 0 5 5 0.22
-M--J-U--
33 m/s 00.0 00.0 0.0 K 22°C 7%
18 0 0 0 5 5 0.24
---MJ----
32 m/s 00.0 00.0 0.0 K 20°C 7%
19 0 0 0 5 5 0.26
---MJ----
31 m/s 02.6 03.1 0.5 K 16°C 7%
20 0 0 0 5 5 0.25
---MJS---
30 m/s 00.0 00.0 0.0 K 13°C 9%
21 0 0 0 5 5 0.22
---MJS---
30 m/s 04.4 05.1 0.5 K 10°C 14%
22 0 0 0 5 4 0.20
L--MJS---
30 m/s 04.4 05.1 0.6 K 10°C 18%
23 0 0 54 5 4 0.20
L--M-S---
31 m/s 04.4 05.1 0.6 K 9°C 20%
Sun
2014.04.20
06:50
18:13
23:09
11:43
waning gibbous (251°)
00 0 0 99 5 4 0.20
L--M-S--P
32 m/s 04.4 05.1 0.6 K 8°C 21%
01 0 0 99 5 4 0.21
L--M-S--P
34 m/s 04.4 05.1 0.6 K 7°C 21%
02 0 0 83 5 4 0.22
L--M-S--P
34 m/s 04.4 05.1 0.5 K 7°C 20%
03 0 0 35 5 4 0.23
L--M-S--P
34 m/s 04.4 05.1 0.5 K 7°C 18%
04 0 0 27 5 5 0.23
L-VM-S-NP
35 m/s 02.6 03.2 1.1 K 6°C 15%
05 0 0 80 5 5 0.23
L-VM-S-NP
34 m/s 02.6 03.2 1.2 K 5°C 14%
06 0 0 78 5 4 0.23
L-V--SUNP
33 m/s 02.6 03.2 1.2 K 4°C 14%
07 0 0 87 5 4 0.24
LMV--SUNP
32 m/s 02.6 03.2 1.2 K 4°C 15%
08 0 0 89 5 4 0.24
LMV--SUNP
31 m/s 02.6 03.2 1.2 K 7°C 14%
09 0 0 95 5 5 0.24
LMV---UNP
30 m/s 02.6 03.2 1.0 K 10°C 14%
10 0 0 100 5 5 0.33
LMV---UNP
28 m/s 02.6 03.2 0.7 K 13°C 13%
11 0 0 100 5 5 0.33
-MV---UNP
27 m/s 00.0 00.0 0.0 K 17°C 12%
12 0 0 100 5 5 0.33
-MV---UNP
27 m/s 00.0 00.0 0.0 K 20°C 13%
13 0 0 100 5 5 0.25
-MV-J-UN-
27 m/s 00.0 00.0 0.0 K 22°C 13%
14 0 0 100 5 5 0.25
-MV-J-UN-
27 m/s 00.0 00.0 0.0 K 23°C 13%
15 0 0 100 5 5 0.26
-MV-J-UN-
26 m/s 00.0 00.0 0.0 K 23°C 13%
16 0 0 100 5 5 0.28
-M--J-U--
26 m/s 00.0 00.0 0.0 K 23°C 13%
17 0 0 100 5 5 0.31
-M--J-U--
26 m/s 00.0 00.0 0.0 K 22°C 14%
18 0 0 100 5 5 0.33
---MJ----
26 m/s 00.0 00.0 0.0 K 21°C 15%
19 0 0 100 5 5 0.36
---MJ----
26 m/s 05.1 05.9 0.5 K 19°C 15%
20 0 0 100 5 5 0.36
---MJS---
28 m/s 05.1 05.9 0.6 K 16°C 17%
21 0 0 100 5 5 0.34
---MJS---
29 m/s 05.1 05.9 0.6 K 12°C 21%
22 0 0 100 5 5 0.29
---MJS---
29 m/s 04.4 05.1 0.5 K 11°C 22%
23 0 0 100 5 5 0.25
L--M-S---
29 m/s 04.4 05.1 0.7 K 11°C 22%

Additional information to your astronomical seeing prediction:

  • Values may not reflect precisely reality
  • For good seeing conditions look for dark blue colours in the cloud cover and green values in the Seeing Indices and Jet Stream
  • The estimated seeing indexes (1 & 2) range from 1 (poor) to 5 (excellent) seeing conditions. This value is computed based on the integration of turbulent layers in the atmosphere.
  • Estimation of seeing in arcseconds. This is a test prediction under development, uncalibrated for the time being.
  • Cloud cover ranges from dark blue (0% cover) to white (100% cover). Fog or very low cloud is not shown here (see pictocast for fog)
  • High jetstream speeds (>35m/s) usually correspond to bad seeing, as well as very low speeds (<5m/s). Colour gives a hint.
  • Bad Layers have a Temperature Gradient > 0.5K/100m. The actual gradient is shown K/100m. The top and bottom height of the Bad layers is indicated by Bad Layers bot/top
  • Visible planets and coordinates also considering temperature profiles of the atmosphere. The following planets/objects are available: LMVMJSUNP => Lunar (Moon), Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
  • If you move your courser over the visible planets column, hourly coordinates for each planet will appear: Azimuth (Az) from north with altitude in degree (Alt) onto horizon, right ascension (RA) and declination (DEC). We may consider adding 10 minutes coordinates and additional objects on request.