| William L. Schart | ||||
| Star:
Lambda
Orionis
Date & Time: November, 10th, 1998 - 11:36 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: Lambda Orionis Date & Time: December 5, 1999, 10:00 to 10:30 pm CST Seeing: 7, darkness: mag 4 Location of site: Killeen, TX, USA (suburban) Telescope: Orion 6" dob Magnification: 48x, 72x, 120x, 240x Star: Lambda Ori Date & Time: 12/9/99, 10:30 pm CST Seeing: 8 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX, USA Site classification: (suburban) Sky darkness: mag 4 Telescope: Orion 6" Dob Magnification: 32x, 48x, 72x, 120x |
This was a
esily split, the primary being a blue-white but the secondary to faint
for me to detect color. This is located at one end of a line of 3 stars
connecting
this pair to psi 1 Orionis. Sunday the 5th was clear and calm, however the seeing did not seem to be the best. The center star in a line
of 3 fairly bright stars. near a line of 3 fainter stars. 2 fainter stars
are located near to this star, but are not part of a system. Lambda
After several attempts tonight,
I was finally able to split this at high power. Very tight pair, only a
couple of seconds apart. Both appeared blue to me.
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| Chuck Layton | ||||
| Star:
Lambda
Orion
Date & Time: Nov. 19, 1998, 07:15 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Tacoma (WA) Site classification: --- Sky darkness: 4.1 <Limiting magnitude> Telescope: 20cm f/6 Eq. Newtonian Magnification: 61x, 177x |
Observed Colorations of
Components: A - white, B - olive, C - white. Other comments:
A moderately challenging triple. The C component is tough to observe
in the glare of the primary. |
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| Luis Argüelles | ||||
| Star:
Lambda Orion
Date & Time: November, 21st, 1998 - 21:45 UT Seeing: 3 <1-10 Seeing Scale (10 best)> Location of site: Alto del Fumeru (Smoking Hill) Spain. (Lat 43.23 N, 5.51W, Elev 1500 ft) Site classification: >Rural Sky darkness: 5-5.5 <Limiting magnitude> Telescope: Televue Ranger refractor. Magnification: 96x |
The observing
conditions are not very good due to rather poor seeing and wind. Anyway,
finding this double star is really easy simply pointing the refractor's
tube towards the head of Orion's Constellation. At 24x I confirm the field, observing the cluster Cr 69 and identifying Lambda Orion. It's very easy to confirm the position due to 3 stars that forms a characteristic line in this area of the sky. These stars are: PPM 149173 - Mv: 6.90
Using 96x I can split Meissa,
showing a noticeable difference in magnitude between components. I believe
to observe the main component as white-blue, while
Anyway, the star seems to
be a tighter double than the 4.4" figure would suggest. Only for checking,
I observed Castor in Geminis only several minutes after
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| Craig M. Carver | ||||
| Star:
Lambda Orion
Date & Time: 11/22/98 0520 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 |
A fine triple star. The primary is white with a close pale blue companion. The other two stars were faint and also appeared blue at 95x and better seen at 190x. | |||
| Paolo Morini | ||||
| Star:
Lambda Orionis
Date & Time: 07 Dec 1998, approx 23 UTC Seeing: 8 <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 eyepiece) Star: Lambda Orionis Date & Time: 6th Dec 1999 , 22 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: 5 <Limiting magnitude> Telescope: Takahashi FS102 Magnification: 164x (Eyepiece Takahashi LE5+Amici prism) |
Very fine the main pair,
not sure to have seen the component C, at the limit of visibiity.
Seen the third component
of vm 11. Very satisfactory as in the last edition of the program I didn’t
see it at all.
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| Dave Mitsky | ||||
| Star:
Lambda Orionis
Date & Time: 1/19/99 02:35 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 |
A very nice triple star consisting of a 4th magnitude white primary and 6th and 11th magnitude companions, the latter of which was distinctly blue. | |||
| Orlon Peterson, Marilyn Head, Giles Reid and David Downing | ||||
| Star:
Lambda Orionis
Date & Time: 13/02/99, 10:00UT to 14:00 UT Seeing: 7-8 got better as night progressed Location: Staveley, ~80km SW of Christchurch, New Zealand. Instrument: 102mm f/9.8 refractor Sky darkness: 6 - 6.5 <Limiting magnitude> Again didn't actually make a definitive measure but the sky was dark and the transparency really good. Magnification: 111x |
Lambda Ori - At 111x I was just able to split the closer of the 2 companions while the other hung well off to one side. | |||
| Ilario Melandri | ||||
| Star:
Lambda Orionis
Date & Time: 6/Dec/1999 – 22.01 UTC Seeing: 4 <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: -0.5C Telescope: 150 mm f/15 achromatic refractor Magnification: 140 x (eyepiece Plossl Clavé 16 mm) |
 |
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| Tomás Vazquez | ||||
| Star:
Lambda Orionis
Date & Time: December, 16, 1999 21:08:35 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: 37 24 N. 5 58 W. Sevilla, Spain Site classification: Urban Sky darkness: 3 <Limiting magnitude> Telescope: Celestron C8” D:203mm. f/6,3 Magnification: CCD Camera
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Observing Method: CCD ST-4
Camera
Integration time: 16 seconds Software used (reading/treatment): Lucas 1.1 / Laia 3.1g Image Position: North up, East left Rich field of stars. Lambda is located in a 1 squared grad nebula, catalogued as Sh2-264. This double is formed by two tight stars. The secondary remains hidden in the glare of the main component in this image. Both stars are O class blue giants and are located about 1,300 light years from us. In the image you can see two stars located with a position angle of 184 and 274 degrees respectively. Sky Catalogue 2000 Vol.2 revels the presence of these two stars of 11 magnitude located at a distance of 29” and 78” respectively, with and apparent angle of 184 and 274 degrees. In North direction, we find
a group of stars aligned at AP 345 degrees. Also, in East direction at
90 degrees we find other stars.
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| Randall Heckman | ||||
| Star:
Lambda Orionis
Date & Time: 12/27/99 at 2:15 UT Seeing: 4 Location of Site: Heckman Observatory 40 37' 10" N and 99 03' 50" W Site Classification: Rural Sky Darkness (Limiting Magnitude): 5.5 Telescope: 8" Orion Dob Magnification: |
Separation (Clear or Toughing):
Clear Magnitude Comment: The mag 11.1 component seemed to be near the limit
of my scope on this occasion.
Color Comment: Mag 5.5 secondary yellow and blue primary General Comment: Nice color contrast between primary and yellow secondary.
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| David Bushard | ||||
| Star:
Lambda 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) |
Maybe this
is not a good night for color. my database says i should expect yellow
and red, but i see white and yellowish tonight for A and B, and C and D
show no apparent color. both C and D are supposed to be mag 11.2,
but C was more easily seen than D, which appeared to me to be more like
12.5.
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| Richard Harshaw | ||||
| Star:
Lambda Orionis [Heka, "white spot"; 39 Ori; STF 738; Meissa; ADS 4179]
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): 0400 on 12/31/99 Site classification: suburban Sky conditions: seeing-- 8 out of 10 transparency-- 8 out of 10 limiting visual magnitude—5 Temperature: 40 F, moderate breeze Telescope: Celestron C-8 Eyepiece: Micro-Guide (160x) with 2.48x Barlow (397x total) |
I made five
sets of measurements with the Micro-Guide illuminated reticule eyepiece
for the AB pair and got an average of 3.9" at PA 46. (If you want the measurements
themselves, reply to this posting.)
I could not get measures on C and D due to their faintness (they would be invisible against the soft glow of the reticule). The field here is quite nice. I noted colors of White, light Violet, and ?? for the 11.2 mag stars. The AB pair was discovered by F. Struve in 1830. The stars are about 2,400 AU apart. The system is a member of the Lambda Ori Association. Star A is a spectroscopic binary. Measurements from 1957:
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| Giuseppe Bandini | ||||
| Star:
Lambda
Orionis
Date & Time: 5/Jan/2000 - Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Italy, Ravenna, Elevation: 0 m Site classification: urban Sky darkness: --- <Limiting magnitude> Temperature: +1.5C Telescope: Celestron 8” Magnification: 80 x (eyepiece 25 mm Plossl) |
 |
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| Rik Hill | ||||
| Star:
Lambda Orionis
Date & Time: 2000-01-05~0700 Seeing: 7-8 (2-3") <1-10 Seeing Scale (10 best)> Location of Site: Location: Jim Loudon Observatory Longitude:110.77554 deg. W or 110 deg. 46' 31.9" Latitude: 32.18006 deg. N or 32 deg. 10' 48.2" Height above sealevel: 2875 ft. see: http://www.lpl.arizona.edu/~rhill/jlobs.html Site Classification: Suburban/Rural Sky darkness: 5.5-6 <Limiting magnitude> Telescope: C11 Magnification: 152x
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Separation
(Clear or Toughing): clear
Magnitude Comment: All three components seen in a star strewn field. Primary & Sec. about equal brightness with little C-component easily seen too. Color Comment: Both bright components were white. No color to C. General Comment: This star was an easy split and the field is a delight.
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| John M. Ryan | ||||
| Star:
Lambda
Orionis
Date of Observation: 23/1/00 at 10:00UT Location of Observation: Ciudad Rodrigo, Salamanca, Spain 40º 36' N, 6º 32'W, Elev. 800 Meters Seeing: 4 (1 - 10, 10 best) Site classification: Urban Limiting Mag. (naked eye): 3-4 with almost full moon Instrument: TeleVue 101 Apo refractor Magnification: 60x, 180x |
Separation (Clear or Touching):
Clear.
Magnitude Comment: Two stars about 4 and 6 as listed. Color Comment: The brighter was pale blue with the second somewhat yellowish. General Comment: From the list of doubles this is a group of three stars with the third one having a magnitued of 11. I had a split of two with the third not being visible. Will have to return to this multiple. |
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| Jim Brownfield | ||||
| Star:
Lambda
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 Star: Lambda Orionis
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split 5.5 mag star at 47x
with mask, & 11.1 mag star at 47x without mask
at 45x could split 11.1 mag star with 5.5 mag star just touching the primary, 82x clearly split both
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| Tom Teague | ||||
| Star:
Lambda
Orionis
Date & Time: 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 |
A lovely star. PA estimated at 30 degrees. There are two distant companions to the west - one about 2 arc minutes away at about PA = 270 degrees, and a fainter one about 1 arc minute distant in estimated PA 265 degrees. I cannot see the companion to the south at any power. Best views x140 and x252 (the close, bright companion cannot be seen at all x53). x252, the close companion seems greyish in colour. | |||
| Daniel Rodríguez | ||||
| Star:Lambda
Orionis
Date & Time: 2/5/2000, 23:40 (UT) Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Jerez de la Frontera, Spain, elev. 24 m Site classification: Urban Sky darkness: 4 <Limiting magnitude> Temperature: 11 ºC Telescope: Celestron G8 (8” SCT f/10) Magnification: 81x, 203x (Celestron 10 mm Plossl, 25 mm SMA)
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Split at 81x, but with a secondary component very close to the primary and the third star seen with averted vision... Best seen at 203x (as shown in the picture). Hints of nebulosity when looking to this star with a LPR filter. This a very fine target for any scope. | |||
| Jay Zimmerman | ||||
| Star:
Lambda Orionis
Date & Time: 02/06/2000, 0430 UT Seeing: 7 <1-10 Seeing Scale (10 best)> Location of Site: Carbondale, IL, USA Site Classification: Suburban/near rural Sky darkness: 5.0 <Limiting magnitude> Telescope: 97mm, f7 apo Magnification: 80x |
Clean split
@ 80x but much better views @ 107x and 160x. Even at high magnification
the C component (mag. 11) was very elusive.
After repeated transits of the ocular field I am reasonably confident that it winked in and out of visibility two or three times for a split second at the correct PA (184°). Don't take this to the bank. It was definitely not a good night for low-magnitude stars. Colors: A and B = white. C not determined.
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| Bill Reinehr | ||||
| Star:
Lambda
Orionis
Date & Time: February 14, 2000, 03:00 UTC Seeing: 8 (very still) <1-10 Seeing Scale (10 best)> Location of site: Pflugerville, Texas, USA (30 degrees N.) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Temperature: 63 F Telescope: Vixen 80mm Fluorite, f/8 on Custom D altaz mount Magnification: 29x,91x, 183x, 256x |
2 brighter
components easily split at 91x. Possibly caught a glimpse of the Mag 11
component but cannot confirm. I doubt it.
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| Richard Bastone | ||||
| Star:
Lambda
Orionis
Date & Time: 2010 2/28/00 Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Chesapeake VA. USA Site classification: Suburban Sky darkness: 4.2 at Zenith <Limiting magnitude> Temperature: 50F Telescope: 102mm Vixen refractor (plain Achromat)GP mount on permanent cement pier. Magnification: 50x, 100x |
5.5 mag component
easy split at 100X.
I tryed many combonations of eyepieces and barlow lens in an attempt to get a glimps of 11.1 mag component. My only success was with a 20mm Vixen Lanthanum eyepiece yielding 50x! With this eyepiece I had a sighting with averted vision and an occasional direct sighting. Why would I not get a sighting with higher power eyepieces? I have several Meade series 4000 eyepieces and a Meade top of the line barlow(yielding 67x to 200x). None of which allowed me to see the 11.1 mag component. I tested the eyepieces on different 11 mag stars with the same results!. Only the Vixen Lanthanum 20mm yielding 50X allows me to see these dim stars. |
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| G.E.O.D.A Group | ||||
| Star:
Lambda 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 = 7.7-30.7; PA = 44-186
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