| Paolo Morini | ||||
| Star:
Rho Orionis
Date & Time: 17 nov 1998, approx 22:30 UTC Seeing: 4 <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: 4.5 <Limiting magnitude> Telescope: Takahashi FS102 Magnification: 164x (LE5 Tak eyepiece) |
The fainter star, 4 magnitude less than the main component, wasn’t immediately seen. Coloration not recorded. | |||
| Craig M. Carver | ||||
| Star:
Rho Orionis
Date & Time: 11/22/98 0540 UT Seeing: 5 <1-10 Seeing Scale (10 best)> Location of site: Madison, WI (Lat 43.07, Long 89.38, Elev. 500 ft) Site classification: Suburban Sky darkness: 4.3-4.5 <Limiting magnitude> Telescope: 6" Maksutov Magnification: 95x, 190x |
Rho is a beautiful pale
orange whose 4.5 mag glare almost drowns out the much fainter blue companion
which I could just separate using 95x. It was a cleaner
separation at 190x, but the sky was too unsteady and fuzzy for 257x. |
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| William L. Schart | ||||
| Star:
Rho Orionis
Date & Time: November, 23th, 1998 - 9:50 pm CST Seeing: 8 <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, 120x Star: Rho Orionis Date & Time: 12/26/99 9:30 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: 4.5 <Limiting magnitude> Telescope: Orion 6" Dob. Magnification: 32x, 48x, 72x, 120x Star: Rho Orionis
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Hopped to this
from 23 Ori. The primary was bright yellow and the secondary was very faint,
too faint for color.
Tried all powers, but not
able to split. At 144x there appeared to be some signs of elongation. Forms
a triangular asterism with 3 fainter but still prominent stars, one of
which is also a double.
I constructed an hexagonal
objective mask on Monday and went back to this pair to see if I could split
them with this aid. I suspected a split at 72x, but definately split at
120x. the primary is bright yellow while the very faint secondary appeared
blue to me. I estimated the PA at about 150d, but the secondary was so
faint that it was really difficult to see it with the reticle illumination
turned on and this is more of a guestimate than a measurement.
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| Chuck Layton | ||||
| Star:
Rho Orionis
Date & Time: Dec.20, 1998, 06:20 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Tacoma (WA) Site classification: --- Sky darkness: 4.4 <Limiting magnitude> Telescope: 20cm f/6 Eq. Newtonian Magnification: 135.5x |
Observed Colorations of
Components: The primary is orange and the comes is bluish green.
Other comments: A delicate and lovely pair. The primary is bright and orange while the secondary is dimmer and bluish green. Very pretty! |
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| Dave Mitsky | ||||
| Star:
Rho Orionis
Date & Time: 1/19/99 03:12 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 |
An attractive pair consisting
of a yellowish 4.5 magnitude K3 primary and a faint blue 8.5 magnitude
comes that was just barely resolved at 118x. The best
view was at 202x. |
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| Orlon Peterson | ||||
| Star:
Rho 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: 208x |
This one I found to be a really good one to look at. Though Orion was getting low in the sky, I found the companion at 208x to the NE of the primary which was seen to appear when the seeing settled just that little bit more. On this night I found this one at mags 5 and 11 to be the most satisfying to observe, and a real treat to show off to those who were about for the Stardate SI. | |||
| Ilario Melandri | ||||
| Star:
Rho
Orionis
Date & Time: 13/Dec/1999 – 19.26 UTC Seeing: 3 <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: 5.5 <Limiting magnitude> Temperature: +2C Telescope: 150 mm f/15 achromatic refractor Magnification: 140 x (eyepiece Plossl Clavé 16 mm) |
 |
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| Randall Heckman | ||||
| Star:
Rho Orionis
Date & Time: 12/26/99 at 3:15 UT Seeing: 3 Location of Site: Heckman Observatory 40 37' 10" N and 99 03' 50" W Site Classification: Rural Sky Darkness (Limiting Magnitude): 4.5 Telescope: 8" Orion Dob Magnification: 120x |
Separation (Clear or Toughing):
Clear
Magnitude Comment: Secondary much dimmer Color Comment: Primary yellow, secondary colorless General Comment: Easy to find
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| Richard Harshaw | ||||
| Star:
Rho Orionis [17 Ori; STF 654; ADS 3797; SAO 112528]
ADS 3823; SAO 131907] 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: Celestron Micro-Guide (160x), 2.48x Barlow (400x effective magnification) |
The 1990 measures
of 7" in PA 64 were checked with the Micro-Guide and an average of 7.3"
in PA 62 was obtained (5 readings).
I noted colors of deep yellow or gold (K3III primary) and bluish-white (F7V). Star A is a spectroscopic binary with a period of 2.824 years. It is also an infra-red source.
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| David Bushard | ||||
| Star:
Rho 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 9mm Nagler (338x) |
AB is easy
enouth at 7 secs sep, but C is 182 sec away, and there would be no reason
to think it was associated unless you already know. at mag 11.8 it
is not difficult to see in a 12" scope. A is yellow, B is blue, and
C shows no apparent color.
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| Allen Ginzburg | ||||
| Star:
Rho Orionis
Date & Time: 01/03/2000, 05:34 UTC Seeing: 8 <1-10 Seeing Scale (10 best)> Location of Site: Aptos, CA (USA) Site Classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: Televue 85mm f/7 Magnification: 120x
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Clearly separated.
Both slightly yellowish.
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| Richard Bise | ||||
| Star:Rho
Orionis
Date & Time: January/7,8/2000 Seeing: 5 <1-10 Seeing Scale (10 best)> Location of site: 20 NW of Tucson Az 32.884N -110.979W Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: 10 inch Meade Dobsonian Magnification: 49x, 125x (25mm Meade and 9.7mm Plössls) |
The 7 second separation
(easy but still close) and the orange/blue color contrast makes this one
a beauty!
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| Steve Ott | ||||
| Star:
Rho Orionis
Location of site: Millersburg, KY Date of observations: Jan 9, 2000, 2:30 - 4 UT Site classification: Suburban Sky darness: ~ 5.5 <limiting magnitude> Seeing: 5 (scale 1-10) Telescope: 94 mm f/7 apo refractor Magnification: 90x, 220x |
Secondary seen
well at 90X, more difficult at 220X. Primary yellow-white, secondary deep
blue.
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| Jay Zimmerman | ||||
| Star:
Rho Orionis
Date & Time: 0450 01/14/00 UT Seeing: 8 <1-10 Seeing Scale (10 best)> Location of Site: Carbondale, IL, USA Site Classification: Suburban/near rural Sky darkness: ~4.2 <Limiting magnitude> Temperature: 22°F (-5.56°C) Telescope: 97mm, f7 apo Magnification: 80x |
Remarks:
Clean split at 80x; best colors at 160x. Colors (at 160x): both A
and B appear yellowish white. Est. PA = 50° (actual = 63°).
B looks very dim next to the relatively bright primary.
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| Philippe de Jocas | ||||
| Star:
Rho
Orionis
Date & Time: January 22, 1h00-7h300 UT Seeing: 3-4 <1-10 Seeing Scale (10 best)>. Location of site: Ottawa/Hull, Canada Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Temperature: -25C Telescope: 6" f5 newtonian Magnification: 120x |
Ori Was a beautiful sight at 120x, though I could resolve it at 90x. I got it down as golden and lavender. | |||
| Jim Brownfield | ||||
| Star:
Rho
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: 47x |
split at 47x with mask | |||
| Tom Teague | ||||
| Star:
Rho
Orionis
Date & Time: 2000 January 25-26, 2200UT Seeing: 7 <1-10 Seeing Scale (10 best)>. Location of site: Chester, England (53 11 08N; 02 51 39W) Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: 63mm Zeiss Telementor refractor Magnification: x53, x140, x252 |
Companion suspected x53. Confirmed x140. Companion is very delicate, at about PA 45 degrees. More difficult to see x252. Re-examined x53 and definitely seen, but difficult. No colours. | |||
| John M. Ryan | ||||
| Star:
Rho
Orionis
Date of Observation: 30/01/00 21;20UT 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: 80x, 167x |
Separation (Clear or Touching):Clear
Split
Magnitude Comment:Bright component and much dimmer component. Color Comment: Both components white General Comment:Clean easy split at both 80x and 167x |
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| John Clemmer | ||||
| Star:
Rho
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: 160x |
The sky conditions were
very clear and very cold, about -15C so my enthusiasm wore thin after about
1.5 hrs. Cold front had just gone through, new moon. My 17mm Televue Plossl
seemed to be the eyepiece for the evening.
160x/clean |
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| Bill Becker | ||||
| Star:
Rho Orionis
Date of observations: Feb. 8, 2000, 4:05UT Location of site: Casper, Wyoming Elev. 5200' Site classification: Suburban Seeing: 6 <1-10 Seeing Scale (10 best)> Sky Darkness: 5 <Limiting magnitude> Telescope: Quantum 4 Maksutov Magnification: 85x & 149x |
Rho Orionis
seen easily split at 85x with the primary being yellow and the 8.3 magnitude
companion at an estimated blue-white. At only 7" separation, the nearly
4 magnitude difference presented no problem.
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| Bill Reinehr | ||||
| Star:
Rho
Orionis
Date & Time: February 16, 2000 4:00 UTC Seeing: 6 + variable <1-10 Seeing Scale (10 best)> Location of site: Pflugerville, Texas, USA (30 degrees N.) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Temperature: 64 F Telescope: Vixen 80mm Fluorite, f/8 on Custom D altaz mount Magnification: 29x, 91x, 183x |
A clean split
at 91x. At 183x, the secondary disappeared. At the lower magnification,
the companion, although dim, was always there and quite easy to see. Simply
no sign of it at 183x. Odd? The primary appeared to be a deep yellow or
even orange. No color detected in secondary.
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| G.E.O.D.A Group | ||||
| Star:
Rho 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 = 9.9; PA = 62
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