Eta Pegasi
Richard Harshaw 
Star: Eta Pegasi
Date & Time: September 5, 2001,
0230 to 0510 UT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Transparncy: 6 to 7 (variable, due to high hazy clouds) <1-10 Seeing Scale (10 best)>
Location of site: Northern Kansas City,
Missouri (USA). 39º15' N, 94º30'W
980 ft above Mean Sea Level
Site classification: suburban 
Sky darkness: -- <Limiting magnitude>
Telescope: Celestron C-8, C-11
Magnification: 112x
Harshaw Scale: 4 <1-5; 1 best>
Bu 1144  (Alias Eta Peg; 44 Peg; Matar, "the fortunate rain")
HD Number 215182
ADS 16211
Position:  2243+3013  Rating:  4
Components:
 A:  2.9m, G2 III
 B:  9.5m, F0 V, 93” @ 339 
Year of last AB Measure:  1926
Distance (l.y.): 215, Luminosity (Suns): 255.6
Observed colors:  Y, ? 

Observations: Observed at 112x.  yW and bW.  Too easy!

Notes: It is a spectroscopic binary with an 818 day period.  It is also an infra-red source.
The stars have different proper motions.

 


 
Bob Hogeveen
Star: Eta Pegasi
Date & Time: Sep 5, 2001; 22.15 
Seeing: 4 <1-10 Seeing Scale (10 best)>
Location of site: Annen, The Netherlands
53 N, 6 E
Site classification: Village-backyard 
Sky darkness: Varying with the clouds 
Telescope: Swarovski AT80, 80mm f/6 spottingscope
Magnification: 20x, 60x
Harshaw Scale: 4 <1-5; 1 best>
Eta peg is a smaller and fainter look-alike of Epsilon Peg. A is light-yellow, quite a bit less yellow than Epsilon A. B is faint and difficult to see at 20x. In clear patches however B could be seen with direct vision. At 60x B was more obvious, especially with averted vision B was "jumping out".

The PA of 333° (very much like Epsilon which is 320°) results in an almost vertical orientation at the moment of observation. With the wide separtion of 91" this doesn't give a "doubles impression", it feels somewhat unnatural and B looks more like an ordinary fieldstar.
Rating: 4 

 


 
Jim Jones
Star: Eta Pegasi
Date & Time: 09/07/01   0615UTC
Seeing: 5 <1-10 Seeing Scale (10 best)>
Location of site: Lake Oswego, Oregon
Site classification: Suburban
Sky darkness: 4.0 LM
Sky:  Full moon + 5 days.
Telescope: 8" LX50
Eye Pieces:  18mm Radian
Magnification: 112x
Est PA without inst....330d
Primary.....yellow
Very bright primary, dim secondary.  Very wide double.  No field to speak of.  Bright oatmeal sky as moon rises.  Bloated stars.  Partial, semi-stable diffraction rings.

I really enjoy the "discovery" of new (to me) doubles while I am observing a double from the list.  I rarely research these before hand preferring to identify my "discoveries" after the fact. For me, it's kind of like opening your presents on Christmas Eve or
Christmas day. 
 
 

 


 
Tomás Vázquez
Star: Eta Pegasi
Date & Time: 9/09/2001, 22:27:13 UT
Seeing: 4 <1-10 Seeing Scale (10 best)>
Location of site: Sevilla. (Spain)
37 24 N. 5 58 W
Site classification: Urban
Sky darkness: 3 <Limiting Magnitude>
Telescope: C8 with Focal Reducer at F/6.3
Eye Pieces: CCD Camera
Magnification: ---
CCD used: SX-L8.
Time of Integration: 30 seconds.
Software Lecture: LUCAS 1.2C
Software Treatment: LAIA 3.2A
Position Image: North up, East left.
Telescope Computer Interface: MICRO-GUIDER III.
Planetarium and Telescope Control Program:
ECU. "Earth Cantered Universe"
Description: The measures that I have taken, Angle of Position and Separation, are the following:

AP: 338.22º D: 91.27"
 

 
 
Data Catalog WDS.
BU 1144 Aa-BC.
m: 3.02/ 9.87 1991: D: 92.9" AP:338°
BU 1144 BC.
m: 10.10/ 10.10 1889: D: 0.2" AP:85°
BU 1144 BC-D.
m: 10.30/ 14.00 1916: D: 62.9" AP:320°
BU 1144 DE.
m: 14.00/ 16.00 1916: D: 5.7" AP:181°
 

 
Mary Flanagan
Star: Eta Pegasi
Date & Time: 26 Sep 2001 03:23 UTC;
Seeing: 5 <1-10 Seeing Scale (10 best)>
Transparency: 5
Location of site: Apple Valley MN, USA
93d 14m 25s W; 44d 45m 17s N
Site classification: Suburban 
Sky darkness: 3 <Limiting magnitude>
Telescope: 12.5" f/5 Dobsonian 
Magnification: 106x
Wide, pale yellow with small white secondary. Sort of blah.
 
 
 
 
 

 


 
John M. Ryan
Star: Eta Pegasi 
Date & Time: 2 Oct. 2001 ( 21:00 UT)
Seeing: 6+ <1-10 Seeing Scale (10 best)>
Location of site: Barreras, Salamanca, Spain.
Site classification: Rural,Suburban.
Conditions: fairly dry but with gusts of wind.
Sky darkness: 3+ almost full moon. lots of light <Limiting magnitude>
Telescope: Televue 101 refracter mounted on a Gibralter Alt-Az tripod.
Eyepieces: 19mm panoptic.
Magnification: 28X
Harschaw's Escale: 3 <1: Excellent, 5: Poor>
This could be a binocular double if it wasn't for the dim secondary. 
Easy split at 28X. Hugh magnitude difference at 3 and 9. Both white

Ambience: My telescope is situated at the back of the land behind our village house about 20 meters from the rear fence. I would estimate the lot to be about 1 1/2 acres in size. Exactly behind our land is a fenced in field of about 5 acres where Juan Miguel kept his little burro. Juan Miguel is the oldest person in the village at 93 years of age. I would estimate that his burro would be about the same but in burro years. Juan Miguel and the burro both had the same kind of grey hair. Each late afternoon when I would set up the telescope he would always come over to investigate what was going on but really to look for tidbits like the rinds from the melons or watermelons that my wife would give to him which he loved to chew on. He was nice company and I could hear him moving around when I was observing. Well the day before this observing session the burro dropped dead and that was the end of the company of Juan Miguel's little burro. Pascual came with his tractor and dragged him away to a hole that he had dug just outside the village. 

When I was at the big 2nd Meeting three weeks ago, we were discussing all kinds of topics about astronomy and one of the subjects was that Luis uses a small recorder to keep his notes of the doubles that he is observing instead of stoping and writing everything down. When I returned I bought a small Sony recorder and this is my first use of the gadget. It was very comfortable in that I didn't have to bother with paper, pencil, red flashlight etc. to make my observations. Thanks Luis.
 


 
Jim Phillips
Star: Eta Pegasi 
Date & Time: Oct. 4, 2001, 8:00-9:15 EDT
Seeing: 7 <1-10 Seeing Scale (10 best)>
Location of site: Charleston, South Carolina, USA
Site classification: Suburban.
Temperature: 70ºF
Sky darkness: --- <Limiting magnitude>
Telescope: AP 155 F/7 Apochromat
Magnification: ---
Very wide unequal double. White, bluish.

 
Eddy O’connor
Star: Eta Pegasi 
Date & Time: October 14th  2001
8-9.30 p.m local; UT +9
Seeing: 7 <1-10 Seeing Scale (10 best)>
Transparency: 8 <1-10 Seeing Scale (10 best)>
Location of site: Terara, New South Wales, Australia
34º52S, 150º.38E
Site classification: Suburban - Rural
Temperature: 18ºC
Sky darkness: 5 - 5.5, No Moon <Limiting magnitude>
Telescope: 8" Newt. F9
Eyepieces: 25mm K, 12.5 mm Ortho
Magnification: 73x, 146x
Harshaw Scale: 2 <1-5, (1 best)>
Matar is found SW of the most northerly section of the great square.

Comments: This is a beautiful yellow star with a wide Blue companion. A classic double and suitable for all ages and machines. Unfortunately, both stars sit just above the iron roof of my house and masquerade as glowing snowballs.
 
 
 
 
 
 
 

 


 
William Schart
Star: Eta Pegasi 
Date & Time: 10/20/01, 8:31 pm CDT
Seeing: 7 <1-10 Seeing Scale (10 best)>
Location of site: Killeen, TX USA
Site classification: Suburban
Sky darkness: 4 <Limiting magnitude>
Telescope: Celestar 8" SCT
Magnification: 80x
A wide double. The primary was a bright white with a tinge of yellow, the secondary is a ghostly blue.
 
 
 
 
 
 
 
 
 

 

 
 
Stuart Clough
Star: Eta Pegasi
Date & Time: 24.10.01 2030 UT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Location of site: Near Halifax
West Yorkshire, England.
Site classification: Suburban
Temperature: 8ºC
Sky darkness: 3.8 (U Mi) <Limiting magnitude>
Conditions: Variable cloud, Wind SW 8 kts
Telescope: Orion Optics UK GX250
10"  f4.8 Newtonian on Vixen GP mount.
Eyepieces: 20mm Plossl
Magnification: x60
             
The secondary, which is optical only, is a very long way from the primary at x60. The 
primary is a lovely pale yellow, but, because of the width, this objects best feature is the interesting field, spoiled by moon and haze on this night.