2018 January 28
Asteroid (84522) 2002 TC302 occulted 4UC 593-005847 for 103 s. This is the longest occultation recorded at Gnosca.
2017 December 22
2017 December 20
2017 November 30
2017 November 23
2017 November 19
2017 October 23
2017 October 14
2017 October 13
Asteroid (335) Roberta occulted 4UC 525-008744 for 19.8 s.
2017 October 06
Asteroid (173) Ino occulted TYC 5632-00827-1 for 4.36 s from the remote site Locarno.
2017 March 17
Asteroid (25846) 2000 EF93 probably occulted 4U 423-53132 during 2 integration times. The event is uncertain.
December 31 2016
Three flashes on the Moon (probably related to meteoroid impacts) were detected in 2016.
December 31 2016
December 30 2016
December 11 2016
November 29 2016
November 7 2016
October 18 2016
Asteroid (43857)1993 VP2 suspectedly occulted 4U 582-5597 for 0.16 s from Gnosca. The event lasted 1 integration time.
October 8 2016
Asteroid (67) Asia occulted TYC 5242-00199-1 for 7.1 s from Gnosca.
A 420 mm newtonian and a 280 mm SC telescope located 2.5 m apart observed the same lightcurve.
September 28 2016
Asteroid (36030) 1999NR59 occulted 1UT 457-443151 for 5.3 s from Gnosca.
September 24 2016
Asteroid (45) Eugenia occulted TYC 1298-00763-1 for 11 s from the remote location of San Bernardino. Observation made with Andrea Manna.
March 1 2016
January 13 2016
December 2 2015
October 31 2015
Asteroid (1075) Helina occulted 2UCAC 29389633 with a duration of 1.0 s from Gnosca.
August 20 2015
April 9 2015
Asteroid (173) Ino occulted 2UCAC 37328537 with a duration of about 5 s from Gnosca and from Bellinzona.
March 12 2015
Asteroid (216) Kleopatra occulted HIP 54599 with a duration of 4.17 s from Bellinzona and 4.34 s from Lumino.
March 9 2015
Asteroid (51) Nemausa occulted 4UC382-077757 for about 7 s from Gnosca
February 26 2015
Marco Iten recorded a very interesting flash of light on the Moon. With Raffaello Lena , we prepared a preliminary report of this rare event.
December 11 2014
Asteroid (465) Alekto occulted 2UCAC 40177689 with a duration of 7.97 s from Gnosca.
September 2 2014
Asteroid (924) Toni occulted 4UC 366-150084 with a duration of 17 s from remote site Bellinzona. The event was recorded with RA motors OFF.
August 23 2014
Asteroid (240) Vanadis occulted 4UC 335-172956 with a duration of 5.1 s from remote site Cadagno.
August 15 2014
Asteroid (4889) Praetorius occulted 4UC 442-123218 with a duration of 0.88 s from Gnosca. This is the shortest duration measured so far.
March 31 2014
Asteroid (442) Eichsfeldia occulted 2UCAC 37717864 with a duration of 15.3 s from Gnosca.
March 24 2014
Asteroid (2562) Chaliapin occulted TYC 1933-01727-1 with a duration of 2.4 s from Gnosca.
March 7 2014
Asteroid (9) Metis occulted HIP 78193 for several seconds from 4 stations: Bellinzona, Gnosca, Biasca and Semione.
March 8 2014
Asteroid (51) Neumasa occulted 4UC 514-024427 with a duration of 11.8 s from Gnosca.
February 6 2014
Asteroid (120) Lachesis occulted TYC 2406-00962-1 with a duration of 18.3 s from Gnosca.
January 15 2014
Asteroid (508) Princetonia occulted 2UCAC 45489325 with a duration of 8.6 s from Gnosca.
January 1 2014
Four probable meteoroid lunar impacts were detected in 2013. The number of the detected moon impacts reaches now 17.
September 9 2013
23 Meteors brighter than 0 mag were captured in less than 3 hours above Gnosca. The September Perseids showed a nice and unpredicted spectacle.
August 10 2013
Asteroid (268) Adorea occulted 4UC 355-195889 with a duration of 6.5 s from Gnosca.
August 3 2013
Asteroid (407) Arachne occulted 4UC 319-088789 with a duration of 23 s from remote site Cadagno.
February 6 2013
Asteroid (31) Euphrosyne occulted 2UCAC 40191357 with a duration of 17.3 s from Gnosca and 6.7 s from Iragna. This observation was made with Jacopo Nannini.
January 26 2013
Asteroid (100) Ekate occulted TYC 0835-01282-1 with a 4.8 sec duration.
January 6 2013
Asteroid (87) Sylvia occulted TYC 1856-00745-1: 25.3 sec duration; 1.7 mag drop. Event captured with Andrea Manna from the remote site Condove.
January 1 2013
Marco Iten and me detected 5 possible meteoroid impacts on the Moon in the year 2013. The grand total is now 13.
November 24 2012
Asteroid (1309) Hyperborea occulted HIP 28558 with a 5 mag lightdrop.
October 8 2012
Asteroid (792) Metcalfia occulted 3UC200-115962. The event lasted 1.2 s.
March 26 2012
Asteroid (712) Boliviana occulted 3UC142-236470. The event lasted 4.5 s.
March 24 2012
Asteroid (686) Gersuind occulted 3UC147-126050. The event lasted 1.8 s.
February 21 2012
The Yaogan1 satellite is flashing quite brigthly (brighter than +1mag) with a period of 6.7s above Gnosca.
N. of flashes: 14 (some clouds prevented the sight)
Date: Feb 14 2012
Time: from 04:48:43.4 UT to 04:50:37.8 UT
February 17 2012
Quaoar occulted a 15.2 magV. A videocamera Watec 120N+ working in 10.24 s integration mode was used. The event lasted three integration intervals.
January 5 2012
Asteroid (198) Ampella occulted UCAC2 40143290 on Dec 29 2011. The event was captured from Gnosca and from the remote site Bigorio.
January 1 2012
Eight lunar impact candidates were detected so far (with Marco Iten) from 2 distant observatories. 6 other flashes (with the same characteristics of a meteoroid impact) were detected from only a single observatory.
September 20 2011
Asteroid (895) Helio occulted the 12.5 magV star TYC 2764-01038-1 on Sep 20 2011. The event lasted 3.2 s.
August 14 2011
A bright sporadic fireball illuminated the sky above Gnosca in the night of Aug 13 2011. A movie is here.
August 11 2011
Asteroid (4709) Ennomos occulted the 9.2 mag star TYC 2224-01391-1. The duration of this event was 6.3 s. The event was captured from 2 nearby telescopes. Here a 19MB movie of the occultation.
May 03 2011
Asteroid (42) Isis occulted TYC 1934-01049-1, a 11.3 mag star in Gemini. The duration was about 2 s.
April 22 2011
Several flashes on the Moon were detected on the waxing Moon of April from Gnosca and from Gordola (Marco Iten’s observatory)
April 1 2011
Asteroid (554) Peraga occulted TYC 1343-01414-1. So far, this is the 11th positive occultation from Gnosca.
February 11 2011
January 25 2011
Asteroid (144)Vibilia occulted TYC 1228-00368-1. This event was captured from the observatory with video technique. A 8.56 s duration was measured. It’s the 10th positive occultation recorded. Curiously, the asteroid Vibilia was also observed from Gnosca in a positive 5.1 s double star occultation event the Sep 19 2006. Here a small 4MB AVI file of the event.
December 14 2010
Geminids above Ticino. The all sky camera captured about 270 geminids in the night of december 13/14.
December 10 2010
The brightness of the 12 mag star UCAC2 43911923 was dimmed for 6.8 s by the 14 mag minor planet (249) Ilse.
September 2 2010
The optical counterpart of the GRB100901A was easily detected from Gnosca. About 12h post-detection that point of light was shining between 17 and 18 mag.
September 1 2010
The 14 mag minor planet (1214) Richilde occulted a 10 magV star in the night of August 28 This image shows the CCD drift-scan of the registered event taken with the main 400 mm f/4 telescope of the observatory. The upper trace was only dark subtracted, the lower trace was electronically processed. The red line shows the intensity of the CCD trace.
The lower image shows the intensity variation (blue line) of the same event registerd simultaneously with a small C8 telescope and a WAT120N+ video camera with GPS time insertion. The red vertical line is placed where the beginning of the occultation occured. Yellow and green intensity lines belong to comparison stars.
May 22 2010
Flyby of the 20 m asteroid 2010KO10 in the night of May 22/23. This 30 s image shows the about 15 mag asteroid trail.
January 29 2010
In the night of Jan 27 2010 was observed the 7th positive occultation. (626) Notburga occulted 2UCAC 46562578. 5 mins and 12 sec before the predicted event, a first luminosity drop was detected. It’s origin is uncertain.
January 15 2010
The 13.3 mag asteroid (442) Eichsfeldia occulted a 12.7 mag star for about 4.8 s in the night of Jan 14 2010.
January 12 2010
The asteroid 2010AL30 captured thru clouds in the evening of Jan 11 2010. (45 images of 14 s each. Luminosity: 17.3 magR).
December 8 2009
The asteroid (52) Europa occulted a 10 mag star in the night of Dec 4 2009.
July 17 2009
May 16 2009
Three unusual flashes were detected during the moon surface patrol of April 30.
March 18 2009
March 4 2009
An animation of comet C/2007N3 (Lulin) spanning more than 6h.
February 24 2009
Another animation of comet C/2007N3 (Lulin) spanning about 5h.
February 18 2009
This animation of the comet C/2007N3 (Lulin) spans about 1 h and one can see the movement of the ion tail. See also this picture.
October 6 2008
The roughly 3 m size object 2008TC3 crossing the sky of the observatory imaged in this 10MB movie.
January 30 2008
The 250m Potentially Hazardous Asteroid 2007TU24 passed above the european nightsky. The January 28th its distance to the earth was 720’000 km. The day after its distance was 630’000km. Its speed was 9,5 km/s relative to the observer. I build up a first and a second animation of this near encounter.
January 1 2008
10 years of minor planet observing : 1998-2008. The total number of the discovered numbered minor planets at Gnosca is 109. 69th rank worldwide.
November 14 2007
October 27 2007
A composite image of the expanding dust of 17P Holmes.
October 25 2007
The outburts of the comet 17P/Holmes photographed between the clouds. With an angular diameter of 2.5 arcmin it is roughly 4 times larger than the angular diameter of Jupiter. Now the comet is a naked eye object in the Perseus constellation.
May 8 2007
Mr. Kazutami Namikoshi, director of the Japan Shiatsu College, and his wife Kyoko were visiting the Gnosca Observatory. The minor planet 61385 Namikoshi was discovered in Gnosca and was dedicated to the memory of Tokujiro Namikoshi (1905-2000) who was the founder of the worldknown Namikoshi Shiatsu therapy.
January 30 2007
Since 2002 ten positive optical GRB counterparts were detected. This time was the turn of GRB070125.
January 2 2007
The GRB060218 was captured from Gnosca the Feb 27 2006 and again the Dec 10 2006.
December 29 2006
October 26 2006
The WMAP (Wilkinson Microwave Anisotropy Probe) satellite was imaged from Gnosca in the night of Oct 26 near the antisolar point.
See also this NASA site.
September 21 2006
Captured the transit of HD209458b.
September 20 2006
The occultation of the double star TYC 1879-02151-1 by the asteroid (144) Vibilia was positive. Its duration was 5.1 s. This is the 4th positive occultation recorded here in Gnosca.
August 1 2006
The asteroid (47164)Ticino, previously designed as 1999TX13, is now circling in the sky around the sun. The asteroid Ticino was discovered at Gnosca in 1999.
May 26 2006
At 16:28:30 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060526.
Observations at Gnosca begun at 20:50 UT, may 26, about 4.5 h later the Swift-BAT-trigger, under fair sky conditions. Imaging lasted until 23:40 UT. As a result a first stacked R-filtered image centred at 21:14 UT shows the OT at 18.8 mag with SNR = 9. (USNO A2.0 catalog). A second stacked R-filtered image centred at 23:20 UT shows the OT at the same magnitude and same SNR. The measured coordinates of the OT were: RA = 15h 31m 18.34s, decl = +00d 17m 04.7s (UCAC2 catalog). Observations continued from 20:40 UT to 22:30 UT, may 27 (about 27 h later the Swift BAT trigger), under good sky conditions. A stacked R-filtered image centred at 21:35 UT shows the OT at about 21 mag with SNR = 4. (USNO A2.0 catalog). Observations continued from 21:30 UT to 22:50 UT, may 29, under good but windy sky conditions. A stacked unfiltered image centred at 22:10 UT don’t show the OT anymore (limiting mag: about 21 at SNR = 3).
May 15 2006
The MACE2006 (Meeting on Asteroids and Comets in Europe) took place in the austrian capital Wien and ended the May 14 with this group photo.
March 25 2006
The Minor Planet Center accepted the proposal of the observatory to assign the name of the great theoretical physicist John A. Wheeler to the minor planet N. 31555 discovered the march 7 1999 at Gnosca. Here the citation:
John Wheeler (b. 1911) is one of the finest theoretical physicists.
From nuclear physics, to quantum theory, to relativity and gravitation,
Wheeler’s work has set the trajectory of research for half a century.
March 14 2006
February 19 2006
Two images show the shift of the north celestial pole between 2000 and 2006. In six years the apparent center of rotation of the stars has moved by about 2 minutes of arc. This is a manifestation of the drift of the earth rotational axis, also known under the name of precession of the equinoxes.
February 10 2006
The images on GRB060206 begun only 24h after the detection made by the Swift-BAT satellite. In this image one can see the optical counterpart at about 20 mag. A spectra made by the Lick Observatory showed a redshift of z = 4.05 for this OT.
February 7 2006
This article on Astronomy and Astrophysics describes and awards the photometric work made also at Gnosca on the double minor planets Tama, Berna, Frostia and Debussy.
January 24 2006
The night of Jan 24 at 15:55UT the HETE satellite detected a long gamma sky signal. At 19:47UT I could observe the same sky region with my telescope. A faint optical signal very near an annoying 15 mag star was to see. The day after I photographed the sky region anew: apparently the signal faded beyond my detection threshold. Here one can see an animation of the two pictures (of Jan 24 and 25).
These two images show the detection of the GRB060124 (the two white lines show the position of the optical counterpart of the GRB). The blue dots in the graph refer to the intensity of both stars in the picture of the january 24th. The red dots refer to the image of january 25th. From both curves one can see that the optical counterpart had faded.
January 21 2006
In the first hours of January 21 the asteroid 2006BA was traveling at about 750’000 km from the Earth. It was quite rapid and it was heading to the south. Its brightness was around the 17 mag. That night only the friend Peter Birtwhistle of the Great Shefford Observatory (obs code J95) and I from Gnosca (obs code 143) were observing 2006BA. Curiously Peter was shooting CCD pictures exactly at the same moment as I did.
Here the astrometry of two contemporary observations(to the tenth of a second):
K06B00A C2006 01 21.01788207 28 30.93 +00 56 21.5 16.8 R J95
K06B00A C2006 01 21.01788307 28 16.00 +00 58 00.6 16.7 R 143
In the left image I show these two positions. The Great Shefford Observatory (J95) is located in Great Britain and is at the North-West from Gnosca (143): therefore the position of the asteroid is more South-East from the position of Gnosca. Between these two positions I could measure about 4 arcminutes, i.e. about 1/8 of the Moon angular diameter. In the right image one can see the original picture of 2006BA taken from Gnosca.
Some hours later 2006BA was transiting at 500’000 km from the earth orbit. This object is not classified as PHA (Potentially Hazardous Asteroid) because it has a too small estimated diameter (roughly 15 m). The positional measurements from Gnosca were the last. No one additional observatory photographed 2006BA.
January 8 2006
The satellite Giove-A, the pioneer of the european fleet of GPS satellite system, was captured above Gnosca the Jan 8 2006. This image shows the faint trace of the satellite transiting at a distance of 23’000 km.