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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. (%)
Tue
2014.07.22
20 0 0 0 5 5 0.35
---M-S--P
45 m/s 00.0 00.0 0.0 K 6°C 29%
21 0 0 0 5 5 0.35
---M-S--P
45 m/s 00.0 00.0 0.0 K 6°C 29%
22 0 0 0 5 5 0.36
---M-S-NP
45 m/s 02.5 03.1 0.6 K 5°C 32%
23 0 0 0 5 4 0.37
---M-S-NP
47 m/s 02.0 03.1 0.8 K 2°C 39%
Wed
2014.07.23
07:13
18:04
04:20
15:34
waning crescent (317°)
00 0 0 0 5 3 0.39
---M-SUNP
48 m/s 02.0 03.7 0.8 K 2°C 42%
01 0 0 0 5 3 0.40
-----SUNP
50 m/s 02.0 03.7 0.8 K 2°C 44%
02 0 0 0 5 4 0.41
------UNP
51 m/s 02.0 03.1 0.9 K 2°C 47%
03 0 0 0 5 4 0.41
------UNP
52 m/s 02.0 03.1 0.9 K 2°C 50%
04 0 0 0 5 4 0.42
L-----UNP
55 m/s 02.0 03.1 0.8 K 2°C 53%
05 0 0 0 4 3 0.44
L-----UNP
58 m/s 06.5 07.4 0.5 K 2°C 55%
06 0 0 0 4 3 0.45
L-V---UN-
60 m/s 06.5 07.3 0.7 K 2°C 56%
07 0 0 0 4 3 0.46
LMV---UN-
61 m/s 06.5 07.3 0.8 K 2°C 57%
08 0 0 0 4 2 0.46
LMV-J-UN-
61 m/s 09.4 10.6 0.5 K 2°C 57%
09 0 0 0 4 3 0.48
LMV-J-UN-
61 m/s 09.4 10.6 0.5 K 4°C 57%
10 0 0 0 3 1 0.51
LMV-J-U--
61 m/s 09.4 10.6 0.6 K 6°C 53%
11 15 4 0 4 2 0.50
LMV-J-U--
60 m/s 09.4 10.6 0.6 K 10°C 37%
12 17 6 0 5 4 0.47
LMV-J----
61 m/s 09.4 10.6 0.6 K 12°C 24%
13 0 1 0 5 4 0.43
LMVMJ----
60 m/s 09.4 10.6 0.6 K 12°C 25%
14 0 0 0 5 4 0.41
LMVMJS---
60 m/s 09.4 10.6 0.6 K 12°C 23%
15 0 0 0 5 4 0.42
-MVMJS---
60 m/s 09.4 10.6 0.6 K 12°C 22%
16 0 0 0 5 4 0.43
-M-MJS---
62 m/s 09.4 10.6 0.6 K 12°C 22%
17 0 0 0 5 4 0.42
---MJS--P
64 m/s 09.4 10.6 0.6 K 11°C 27%
18 0 0 0 1 1 0.40
---M-S--P
65 m/s 09.4 10.6 0.7 K 9°C 31%
19 0 0 0 4 2 0.41
---M-S--P
65 m/s 09.4 10.6 0.7 K 6°C 41%
20 0 0 0 4 3 0.41
---M-S--P
64 m/s 09.4 10.6 0.7 K 5°C 48%
21 0 0 0 4 3 0.41
---M-S--P
62 m/s 09.4 10.6 0.7 K 5°C 50%
22 0 0 0 5 3 0.42
---M-S-NP
61 m/s 09.4 10.6 0.7 K 3°C 49%
23 0 0 0 5 3 0.44
---M-S-NP
60 m/s 09.4 10.6 0.7 K 2°C 49%
Thu
2014.07.24
07:13
18:05
05:10
16:24
waning crescent (329°)
00 0 0 0 4 3 0.45
---M-SUNP
61 m/s 09.4 10.6 0.7 K 0°C 51%
01 0 0 0 4 2 0.45
-----SUNP
62 m/s 09.4 10.6 0.7 K 0°C 52%
02 0 0 0 3 1 0.47
------UNP
63 m/s 09.4 10.6 0.8 K 1°C 55%
03 0 0 0 3 1 0.49
------UNP
63 m/s 09.4 10.6 0.8 K 1°C 58%
04 0 0 0 3 1 0.55
------UNP
64 m/s 09.4 10.6 0.8 K 1°C 61%
05 0 0 0 3 1 0.61
L-----UNP
64 m/s 09.4 10.6 0.8 K 1°C 59%
06 0 0 0 3 1 0.63
L-V---UN-
64 m/s 09.4 10.6 0.8 K 1°C 54%
07 0 0 0 3 1 0.62
LMV---UN-
64 m/s 09.4 10.6 0.8 K 1°C 49%
08 0 0 0 3 1 0.51
LMV-J-UN-
64 m/s 09.4 10.6 0.8 K 2°C 46%
09 0 0 0 4 2 0.43
LMV-J-UN-
64 m/s 09.4 10.6 0.8 K 3°C 58%
10 0 0 0 3 1 0.38
LMV-J-U--
63 m/s 09.4 10.6 0.7 K 4°C 65%
11 0 0 0 4 2 0.31
LMV-J-U--
62 m/s 09.4 10.6 0.7 K 7°C 61%
12 0 0 0 4 2 0.26
LMV-J----
62 m/s 09.4 10.6 0.7 K 9°C 52%
13 0 0 0 4 3 0.26
LMVMJ----
62 m/s 09.4 10.6 0.7 K 10°C 43%
14 0 0 0 5 3 0.26
LMVMJS---
63 m/s 09.4 10.6 0.7 K 10°C 36%
15 0 0 0 5 3 0.27
LMVMJS---
64 m/s 09.4 10.6 0.7 K 11°C 29%
16 0 0 0 5 3 0.25
-M-MJS---
65 m/s 09.4 10.6 0.7 K 12°C 26%
17 0 0 0 5 3 0.24
---MJS--P
66 m/s 09.4 10.6 0.7 K 12°C 25%
18 0 0 0 5 3 0.24
---M-S--P
67 m/s 09.4 10.6 0.7 K 11°C 24%
19 0 0 0 5 4 0.24
---M-S--P
68 m/s 09.4 10.6 0.7 K 10°C 25%
20 0 0 0 4 3 0.24
---M-S--P
67 m/s 08.4 10.6 0.6 K 8°C 28%
21 0 0 0 5 3 0.25
---M-S-NP
67 m/s 08.4 10.6 0.6 K 6°C 33%
22 0 0 0 4 2 0.24
---M-S-NP
66 m/s 08.4 10.7 0.6 K 5°C 37%
23 0 0 0 4 2 0.23
---M-S-NP
66 m/s 08.4 10.6 0.6 K 4°C 38%

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.