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Astronomical seeing Ypsilanti

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 EDT 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. (%)
Wed
2014.07.23
20 99 99 99 3 1 1.32
---MJS--P
1 m/s 08.5 09.6 0.5 K 18°C 2%
21 89 65 97 3 1 1.34
---M-S--P
16 m/s 08.5 09.6 0.5 K 18°C 42%
22 82 40 96 3 1 1.34
---M-S--P
26 m/s 08.5 09.6 0.5 K 18°C 72%
23 78 23 95 3 1 1.32
---M-S-NP
32 m/s 08.5 09.6 0.5 K 18°C 89%
Thu
2014.07.24
06:22
20:59
04:25
19:11
waning crescent (329°)
00 77 15 95 3 1 1.29
---M-S-NP
33 m/s 08.5 09.6 0.5 K 18°C 91%
01 77 13 94 3 1 1.26
-----SUNP
31 m/s 08.5 09.6 0.5 K 19°C 84%
02 76 12 89 2 1 1.27
------UNP
29 m/s 09.6 10.8 0.5 K 20°C 76%
03 71 8 78 1 1 1.29
------UNP
27 m/s 09.6 10.8 0.6 K 20°C 69%
04 64 4 64 2 1 1.32
L-----UNP
26 m/s 09.6 10.8 0.6 K 21°C 67%
05 58 0 52 3 1 1.35
L-V---UN-
26 m/s 09.6 10.8 0.6 K 22°C 66%
06 54 0 47 3 1 1.41
LMV---UN-
26 m/s 09.6 10.8 0.5 K 21°C 66%
07 51 0 43 4 2 1.50
LMV-J-UN-
25 m/s 01.0 04.4 0.7 K 21°C 67%
08 47 0 37 4 2 1.60
LMV-J-UN-
25 m/s 01.0 04.4 0.7 K 19°C 71%
09 41 0 25 3 1 1.70
LMV-J-UN-
25 m/s 09.5 10.8 0.5 K 18°C 76%
10 33 0 11 3 1 1.79
LMV-J-U--
25 m/s 09.5 10.8 0.6 K 16°C 82%
11 27 0 2 3 1 1.87
LMV-J-U--
24 m/s 09.5 10.8 0.7 K 15°C 87%
12 23 0 0 3 1 1.90
LMV-J-U--
24 m/s 09.5 10.7 0.7 K 14°C 87%
13 21 0 4 3 1 1.90
LMV-J----
23 m/s 09.5 10.7 0.7 K 14°C 86%
14 17 0 8 3 1 1.90
LMV-J----
22 m/s 09.5 10.7 0.7 K 13°C 85%
15 11 0 9 3 1 1.89
LMVMJ----
22 m/s 09.5 10.7 0.7 K 13°C 86%
16 5 0 7 3 1 1.86
LMVMJS---
22 m/s 09.5 10.7 0.6 K 12°C 87%
17 0 0 4 3 1 1.82
LMVMJS---
22 m/s 09.5 10.7 0.6 K 12°C 89%
18 0 0 3 3 1 1.78
LMVMJS---
21 m/s 09.5 10.7 0.5 K 12°C 88%
19 0 0 2 3 1 1.73
-MVMJS---
21 m/s 09.5 10.7 0.5 K 12°C 86%
20 0 0 2 3 1 1.67
---MJS--P
20 m/s 09.5 10.7 0.5 K 13°C 82%
21 0 0 1 3 1 1.62
---M-S--P
21 m/s 08.4 10.7 0.5 K 15°C 74%
22 0 0 0 4 2 1.56
---M-S--P
22 m/s 09.5 10.7 0.7 K 17°C 66%
23 0 0 0 4 2 1.52
---M-S-NP
23 m/s 09.5 10.7 0.7 K 19°C 59%
Fri
2014.07.25
06:23
20:58
05:19
19:55
waning crescent (341°)
00 0 0 0 3 1 1.53
---M-S-NP
23 m/s 08.4 10.7 0.6 K 20°C 53%
01 0 0 0 3 1 1.50
-----SUNP
22 m/s 08.4 10.7 0.6 K 21°C 50%
02 0 0 0 3 1 1.42
------UNP
22 m/s 08.4 10.7 0.6 K 22°C 48%
03 0 0 0 4 2 1.43
------UNP
23 m/s 08.4 09.5 0.6 K 23°C 46%
04 0 0 1 4 2 1.50
------UNP
25 m/s 08.4 09.5 0.5 K 23°C 46%
05 0 0 0 5 4 1.58
L-V---UN-
26 m/s 02.0 03.1 0.9 K 23°C 48%
06 0 0 0 5 4 1.59
LMV---UN-
26 m/s 02.0 03.1 0.9 K 23°C 49%
07 0 0 0 5 4 1.53
LMV-J-UN-
26 m/s 02.0 03.1 0.9 K 23°C 52%
08 0 0 0 5 3 1.45
LMV-J-UN-
25 m/s 01.5 03.1 0.8 K 23°C 55%
09 0 0 12 5 3 1.38
LMV-J-UN-
25 m/s 01.5 03.1 0.8 K 22°C 57%
10 0 0 27 4 2 1.34
LMV-J-U--
24 m/s 07.5 08.4 0.6 K 21°C 58%
11 0 0 39 4 2 1.25
LMV-J-U--
24 m/s 07.5 08.4 0.6 K 20°C 59%
12 0 0 43 5 3 1.30
LMV-J-U--
24 m/s 01.5 02.6 1.0 K 20°C 61%
13 0 0 41 4 3 1.34
LMV-J----
24 m/s 03.1 03.7 0.5 K 19°C 62%
14 0 0 33 4 2 1.34
LMV-J----
24 m/s 05.8 07.5 0.5 K 19°C 63%
15 0 0 21 3 1 1.28
LMVMJ----
27 m/s 05.8 07.5 0.5 K 19°C 63%
16 0 0 9 4 2 1.16
LMVMJS---
29 m/s 05.8 06.6 0.6 K 18°C 64%
17 0 0 0 4 3 1.15
LMVMJS---
32 m/s 05.8 06.6 0.6 K 18°C 67%
18 0 0 0 4 2 1.13
LMVMJS---
32 m/s 05.8 06.6 0.5 K 17°C 70%
19 0 0 0 4 3 1.12
LMVMJS---
32 m/s 01.5 03.1 0.8 K 16°C 73%
20 0 0 0 4 3 1.13
---MJS--P
32 m/s 01.5 03.1 0.8 K 17°C 74%
21 0 0 1 4 3 1.14
---M-S--P
31 m/s 01.5 03.1 0.8 K 18°C 72%
22 0 0 1 4 3 1.16
---M-S--P
31 m/s 05.1 05.8 0.5 K 20°C 67%
23 0 0 1 4 3 1.18
---M-S-NP
29 m/s 05.1 05.8 0.5 K 21°C 62%

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.