| Observing Location | DR |
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| Observational Period | 1030-1215 EST |
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| Atmospheric Conditions |
| Cloud Cover | Scattered Clouds |
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| Temperature | 40° F |
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| Wind | Light Breeze
gusting to
Moderate Breeze |
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| Wind Chill Effect | 35° F |
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| Humidity | Moderate |
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| Barometric Pressure | 29.96" Hg
Steady |
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| Feels Like | Pleasant |
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|
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| Instruments | West Marine 7x50 Raiatea binocular - Charlie |
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Takahashi 102mm F/8.2 refractor - Peter
- 1.5" TeleVue Plossl 32mm, ##° FoV, 31.8x
- 1.25" TV Nagler 13mm, 82° FoV, 97.7x
- 1.25" TV Plossl 7mm, 82° FoV, 181.4x
| Observing Party | Charlie Ridgway
Peter Tagatac |
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Peter and I met at Drip Rock again with the aim of observing sunspots, Venus and hopefully Jupiter. Owing to increasing clouds all we got was the sunspots.
| Target | Sunspots |
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| Constellation | Aqr |
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| Category | Solar |
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Time
yyyymmdd.hhmm | 20100220.1030 EST |
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| Comments |
Distance
Light Time | 0.989 AU
8m 13s |
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| Angular Size | 32' 24.0" |
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| Altitude | 34.2° |
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Heliographic Latitude
(B0) | -7.04 ° |
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Heliographic Longitude
(L0) | 85.96° |
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Parallactic Angle
(P) | -19.16° |
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Carrington rotation number
(CR) | 2093 |
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I looked naked-eye and with my binocular and did not see anything. At low power I saw the group and 4 spots in it. At high power I made out 8 spots.
| | Groups | Spots | R |
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| Low power |
|---|
| North | 1 | 4 | 14 |
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| South | 0 | 0 | 0 |
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| Total | 1 | 4 | 14 |
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| High power |
|---|
| North | 1 | 8 | 18 |
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| South | 0
| 80 | 10 |
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| Total | 1 | 8 | 18 |
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| R = (Groups * 10) + Spots) |
- Group 1049
-
| Heliographic Latitude | 21° |
|---|
| Heliographic Longitude | 131° |
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Carrington rotation number
(CR) | 2093 |
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| Mcintosh System | Cro |
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Based on what Peter told me about the orientation of the image in his scope I judged the group to be in the northern hemisphere but in both the SOHO image and the Raben map it appears as a southern hemisphere.
www.raben.com graphic
When I plotted its location in Helio it showed the exis o fthe sun rotated. When I oriented the graphic to match the telescope view the spot showed to be in the northern hemisphere as I judged it to be.
Helio graphic
I am sure that NASA knows where this spot is and that Peter knows how the image in his scope relates to reality. So I must not understand how to properly use Helio. |
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