| William L. Schart | ||||
| Star:
Psi Orionis
Date & Time: November, 10th, 1998 - 11:45 pm CST Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: Orion 6" Dob. Magnification: 48x, 72x, 120x Star: Psi Orion
Star: Psi 2 Orionis
Update from : 12/25/98
10:37 pm CST using a micrometer reticle:
|
The primary
was a bright yello-orange, while the secondary was to faint for me to detect
color. Located by hopping from psi 1 Ori.
When looking for eta Ori
I saw what appeared to be a pair in the finder. I later determined that
these were unrelated.
Hopped here from 23 Ori.
The primary was white and the secondary was faint. Easily split at high
power. PA measured at 357 degrees, separation at 103.14".
PA measured at 357 degrees, separation at 103.14". |
|||
| Craig M. Carver | ||||
| Star:
Psi Orionis
Date & Time: 11/27/98 0030 LT Seeing: 5 <1-10 Seeing Scale (10 best)> Location of site: Randalman, NC (Lat 36.07, Long 79.79, Elev. 500 ft) Site classification: Rural Sky darkness: 5.1-5.3 <Limiting magnitude> Telescope: 6" Maksutov Magnification: 190x, 257x |
Psi and Struve 712 look
like a wide double star in my 6x30 finder. Psi is a difficult split
for my 6" scope, but at moments of steady seeing I can just begin to split
it at 190x and 257x. Both stars appear white. The moon has set and
the sky has gotten clearer and colder.
|
|||
| Chuck Layton | ||||
| Star:
Psi Orionis
Date of Observation: Jan. 11, 1999 Time of Observation: 0630 UT Seeing (1 - 10, 10 best): 5 Site classification: Suburban Limiting Mag. (naked eye): 4.8 Instrument Used: 20cm f/6 Eq. Newtonian Magnifications Used: 244X |
Observed Colorations
of Components: Both components appear white.
Other comments: I was quite surprised by this very close pair. In my light-polluted area I thought that the magnitude difference and close separation would make this double nearly impossible. But at 244X there sat the secondary, cleanly split.
|
|||
| Paolo Morini | ||||
| Star:
Psi Orionis
Date & Time: 15 Jan 1999, 22 UTC Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: San Romualdo, a little village in the country near Ravenna – Italy. Site classification: Suburban Sky darkness: 5 <Limiting magnitude> Telescope: Takahashi FS102 Magnification: 164x (LE5 Tak eyepiece) - 205x (LV4 Eyepiece) |
Observed Colorations
of Components: Both components appear white.
Other comments: I was quite surprised by this very close pair. In my light-polluted area I thought that the magnitude difference and close separation would make this double nearly impossible. But at 244X there sat the secondary, cleanly split.
|
|||
| Dave Mitsky | ||||
| Star:
Psi Orionis
Date & Time: 1/19/99 04:00 UT Seeing: 6 <1-10 Seeing Scale (10 best)>. Transparency: ~ 4 Location of site: ASH Naylor Observatory (http://www.msd.org/obs.htm) near Lewisberry, PA Site classification: Rural Sky darkness: ~ 5.0 <Limiting magnitude> Telescope: 17" f/15 classical Cassegrain Magnification: 118x, 202x, 249x, 381x |
This pair of magnitude 5 (B2) and 11 stars was very difficult to resolve, with a possible split occurring at 381x. (The seeing may have deteriorated by the time I made this observation.) | |||
| Orlon Petterson | ||||
| Star:
Psi Orionis
Date & Time: 12/02/99, 9:30UT to 14:00 UT Seeing: 9 Location: Staveley, ~80km SW of Christchurch, New Zealand. Instrument: 102mm f/9.8 refractor Sky darkness: 6 - 6.5 <Limiting magnitude> Didn't actually make a definitive measure but the sky was dark and the transparency really good. Magnification: n/a |
This pair of magnitude 5 (B2) and 11 stars was very difficult to resolve, with a possible split occurring at 381x. (The seeing may have deteriorated by the time I made this observation.) | |||
| Ilario Melandri | ||||
| Star:
Psi
Orionis
Date & Time: 4/Jan/2000 – 20.06 UTC Seeing: 9 <1-10 Seeing Scale (10 best)> Location of site: Italy, Ravenna, San Romualdo, Lat 44 32’N Lon 12 08’E Elevation: 0 m Site classification: Rural Sky darkness: 4 <Limiting magnitude> Temperature: -1C Telescope: 150 mm f/15 achromatic refractor Magnification: 140 x (eyepiece Plossl Clavé 16 mm) |
 |
|||
| Richard Harshaw | ||||
| Star:
Psi Orionis [30 Ori; Knott 3; ADS 4039; SAO 112775]
Location of site: Northern Kansas City, Missouri (USA) 94d 30m west longitude, 39d 15m north latitude 980 ft above Mean Sea Level Date of observations (UT): Dec 29, 1999 (0200 to 0400 UT) Site classification: suburban Sky conditions: seeing-- began at 8 out of 10, degraded to 6 by 0400 UT transparency-- 8 out of 10 limiting visual magnitude—4.5 Temperature: began at 40F, dropped to 26F by 0400; no wind at first, but a breeze picked up slightly as a front passed by about 0330 UT Telescope: Celestron C-8 Eyepiece: 10 mm Plossl (200x) with 2.48x Barlow (500x) |
Colors of White
(B2IV) and bluish-white. A very difficult pair to resolve given the
huge contrast in magnitudes and deteriorating seeing.
The pair may be 1,420 light years away, implying a total luminosity of about 2320 Suns. Star A is a spectroscopic binary with a 2.5260 day period. It also rotates rapidly (141 km/sec at the equator). It is a Beta CMa variable. The AaxB period is on the
order of 6,300 years.
|
|||
| David Bushard | ||||
| Star:
Psi 2 Orionis
Location of site: River Falls, WI (USA) longitude 92, latitude 45N elevation approx 800 ft (246 m) Date of observations: 29 Dec 1999, 8:00 to 11:00 pm local time (CST) Site classification: rural Sky conditions: Seeing: 6 of 10, improving later transparency: 6 of 10 limiting visual magnitude: 5.2 Temperature: 25 F (-3 C), winds light and variable Telescope: Meade 12" LX-200 EC Eyepiece: Televue 13mm Nagler (234x) |
No color apparent
to me in any of the 3 components, though my database says A and B should
appear yellow. not to me tonight, they don't. B was difficult
to separate from A (2.7 secs), but definite. Curiously, this is closer
than STF 712, which required higher power to split. C was clearly seen,
though as with rho there would be no reason to think it was associated
without already knowing it.
|
|||
| Allen Ginzburg | ||||
| Star:
Psi Orionis
Date & Time: 01/03/2000 Seeing: 8 <1-10 Seeing Scale (10 best)> Location of Site: Aptos, CA (USA) Site Classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: Meade LX-200 f/10 Magnification: 216x
|
Completely
separated, but barely visible due to difference in magnitude and faintness
of the secondary.
|
|||
| Giuseppe Bandini | ||||
| Star:
Psi
Orionis
Date & Time: 5/Jan/2000 - 21.23 UTC Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Italy, Ravenna, Elevation: 0 m Site classification: urban Sky darkness: --- <Limiting magnitude> Temperature: +1C Telescope: Celestron 8” Magnification: 80 x (eyepiece 25 mm Plossl) |
|
|||
| Jim Brownfield | ||||
| Star:
Psi
Orionis
Date & Time: 26/01/2000, 6:30 p.m.- 11:30 p.m. EST Seeing: 3 – 5 (improving) <1-10 Seeing Scale (10 best)>. Location of site: Huntsburg, Ohio, USA Site classification: Suburban Sky darkness: 6 mag., could see ST 855, going to 5th mag. star Rho <Limiting magnitude> Other observing conditions: 83% humidity, 16 degrees F. with 12" snow on ground going to 84% humidity, 4 degrees F. Telescope: 13.1"/F4.5 Dobsonian, with 5" aperture mask for the brighter pairs Magnification: 140x |
140x with mask, but after failing at ST 111, I tried it again without success | |||
| John M. Ryan | ||||
| Star:
Psi
Orionis
Date of Observation: 30/01/00 21:55UT Location of Observation: Ciudad Rodrigo, Salamanca, Spain 40º 36' N, 6º 32'W, Elev. 800 Meters Seeing: 7 to 8. Best so far this new year based on the Luis Arguelles method (0 - 10, 10 best) Site classification: Urban Limiting Mag. (naked eye): 5 Instrument: Meade 8"SCT Magnification: 167x, 286x |
Separation (Clear or Touching):Clear
split
Magnitude Comment:Bright and Dim components in accordance with the data of 5 & 11 mags. Color Comment:Both components tend to be very pale blue. General Comment: Had to stay with this one for quite a while to confirm the split because of the closeness and the great difference in magnitudes. Gaining expierience helps a lot with close doubles of different magnitudes. |
|||
| John Clemmer | ||||
| Star:
Psi
Orionis
Date & Time: Feb 7/200, 2100 EST Seeing: 6, a bit bouncy <1-10 Seeing Scale (10 best)> Location of site: Priceville, Ontario, Canada W80 41'41" N44 10' 40" Site classification: Rural Sky darkness: didn't check lowest vis. magnitude. best would be circa 6.2 <Limiting magnitude> Temperature: -15C Telescope: 4.5" f26 Kutter Schiefspiegler Magnification: 170x, 194x (17mm and 13.8 mm eyepiece) |
Tried w 17mm 170x and 13.8mm
194x There was quite a bit of diff. ring shimmering. I think I saw it as
things periodically cleared in that area. This was the best transparency
condition I've experienced with the Schieffspiegler at our new site. I
was impressed with the contrast. I'll keep looking at this one.
|
|||
| G.E.O.D.A Group | ||||
| Star:
Psi Orionis
Date & Time: 3-III-2000, 19:00-22:00 Seeing: 7.5 <1-10 Seeing Scale (10 best)> Location of Site: Manises, Valencia, Spain. GPS coordinates: 39º 29' 36" N, 00º 27' 56" W. Site Classification: Urban-Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: Meade 10" LX-200 SCT Magnification: 200x |
Published measures
are the mean of two observations made from two different observers.
d = 2.2 ; PA = 314
|
|||