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Two variable stars discovered
ESA's Gaia mission has catalogued nearly 12 million variable stars, published in 2022 through Gaia Data Realease 3 (Gaia DR3). The...
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Admin
- 28 nov 2023
- 1 min.
Automating a flip mirror.
I have added a new project to the website https://www.observatorio-majadahonda.com/motorised-flip-mirror which explains how to automate a...
14 visualizaciones0 comentarios
Admin
- 26 nov 2023
- 1 min.
Star field with asteroids
Photometric observation of asteroids is one of the most interesting activities for amateurs. To analyse the rotation of an asteroid it is...
16 visualizaciones0 comentarios
Admin
- 11 may 2023
- 2 min.
Unexpected visitor next to supernova SN2023BEE
The supernova SN2023BEE, discovered on 1 February 2023, has been extensively photographed and measured, most notably by the Supernova...
12 visualizaciones0 comentarios
Admin
- 29 nov 2022
- 2 min.
Triple star system b Persei
b Persei (which is not the same as beta Persei, Algol) is an exciting triple star system with a hierarchical structure. The main part of...
13 visualizaciones0 comentarios
Admin
- 18 oct 2022
- 2 min.
Is there life on Europa, Jupiter's icy moon?
How to help as an amateur to answer this question. Europa is, along with Io, Ganymede and Callisto, one of Jupiter's four largest...
6 visualizaciones0 comentarios
Admin
- 18 oct 2022
- 2 min.
Occultation of a star by the asteriod Egeria
In January 2021, a double (actually triple as we shall see) star was occulted by the asteriode Egeria. This post explains my experience...
8 visualizaciones0 comentarios
Admin
- 11 ago 2022
- 1 min.
Measuring the rotation period of 15 asteroids
The Minor Planet Center published in the bulletin "volume 49, number 2" corresponding to the period April to June 2022, a work of the...
10 visualizaciones0 comentarios
Admin
- 6 ago 2022
- 4 min.
AllSky Portable
The summer holidays are a good time to undertake new astronomy-related projects that are adapted to the circumstances of being on the...
142 visualizaciones0 comentarios
Admin
- 12 abr 2022
- 1 min.
AAVSO Observer Award
Many thanks to the AAVSO for their recognition of the report of more than 1,000 photometric measurements with the PEP (Photoelectric...
14 visualizaciones0 comentarios
Admin
- 7 abr 2022
- 1 min.
Zubenelgenubi occultation by the Moon
Occultations of stars by the Moon are of interest in astronomy for measurements of lunar topography, measurements and even discovery of...
31 visualizaciones0 comentarios
Admin
- 4 abr 2022
- 1 min.
About eclipsing binary systems
In this video you will see an eclipsing binary star system like you have never seen before ... I hope you enjoy it. It was prepared for a...
13 visualizaciones0 comentarios
Admin
- 8 feb 2022
- 1 min.
Potentially hazardous asteroid captured on Earth approach
Asteroids are classified as potentially hazardous when they have a minimum distance of intersection of their orbit with the Earth of less...
12 visualizaciones0 comentarios
Admin
- 5 ago 2021
- 2 min.
Complete renovation of the dome
During the pandemic confinement, I took the opportunity to undertake a major overhaul of the dome. The improvements I had to address...
21 visualizaciones0 comentarios
Admin
- 9 abr 2021
- 2 min.
An astronomical observatory on a window ledge
I am fortunate to have a large terrace at home where I have been able to install two observatories: a rotating dome and a clamshell dome....
97 visualizaciones0 comentarios
Admin
- 19 ene 2021
- 1 min.
The solar cycle 25 advances
The solar cycle 25 started in 2020 and a maximum of activity is expected for 2025. In January 2021, specifically on the 16th, a new group...
13 visualizaciones0 comentarios
Admin
- 7 ene 2021
- 1 min.
AAVSO award
I am very grateful to the AAVSO (The American Association of Variable Star Observers) for recognizing my contribution of over 500...
11 visualizaciones0 comentarios
Admin
- 23 dic 2020
- 1 min.
The Great Conjunction of Jupiter and Saturn
On December 21, 2021, the Great Conjunction of Jupiter and Saturn took place, expected by all the fans, but illusion truncated at least...
5 visualizaciones0 comentarios
Admin
- 1 sept 2020
- 1 min.
Digital Setting Circles
I have added in the "Projects" section, a new work DIY. The goal is to make Digital Setting Circles that will improve the visual...
125 visualizaciones1 comentario
Admin
- 25 ago 2020
- 1 min.
Transit of the ISS by the Sun
Thanks to the helpful service of CalSky Alerter (https://www.calsky.com/) I received an email informing me that the ISS could be seen...
20 visualizaciones0 comentarios
Admin
- 18 ago 2020
- 1 min.
Occultation of Venus by the Moon
On June 19, 2020, the Moon occulted Venus for more than an hour. The trajectory of both along the ecliptic crossed. This phenomenon is...
20 visualizaciones0 comentarios
Admin
- 17 ago 2020
- 2 min.
The thousand faces of the full moon
You might think that when we look through the telescope to see or photograph the full moon we always see the same image, but the fact is...
18 visualizaciones0 comentarios
Admin
- 26 may 2020
- 1 min.
Venus and Mercury in the evening after the conjunction
The conjunction of Venus and Mercury took place this month of May 2020 at 9:44 local time, Venus passing through the north of Mercury at...
5 visualizaciones0 comentarios
Admin
- 5 abr 2020
- 1 min.
Venus in conjunction with the Pleiades
Every year Venus passes close to the Pleiades cluster (M45), but only every 8 years a perfect conjunction is produced, crossing the...
35 visualizaciones0 comentarios
Admin
- 23 mar 2020
- 2 min.
Venus at its maximum elongation
Venus is in an optimal position for observation when it is at its maximum elongation, i.e. when the angle between the Sun and Venus as...
177 visualizaciones0 comentarios
Admin
- 10 dic 2019
- 1 min.
Mercury Transit November 2019
Currently, the transits of Mercury take place in May (near its passage through the descending node) or in November (near its passage...
16 visualizaciones0 comentarios
Admin
- 8 dic 2019
- 3 min.
Northern lights in August
Iceland is an incredible destination to see nature. At the end of August, the conditions are excellent to enjoy the amazing landscapes of...
20 visualizaciones0 comentarios
Admin
- 10 nov 2019
- 1 min.
Get accurate timestamp in your measurements
If you are interested in photometric or astrometric measurements with your equipment, you can get high precision in the timing of your...
25 visualizaciones0 comentarios
Admin
- 12 ago 2019
- 3 min.
Calculating the size of the Moon with a photo
Already Hipparchus of Nicea around 150 B.C. relied on the shadow of the Earth on the Moon during lunar eclipses to calculate the relative...
219 visualizaciones0 comentarios
Admin
- 4 ago 2019
- 1 min.
Sun without spots
Today is August 4, 2019, and since July 25 the sun shows no sunspots or active regions on the visible surface towards the Earth. They are...
17 visualizaciones0 comentarios
Admin
- 16 jul 2019
- 1 min.
Partial Moon Eclipse on Apollo 11 Anniversary
On July 16, 2019 there was a partial eclipse of the moon. The photo shows a moment of the eclipse, photographed from Majadahonda (Madrid)...
7 visualizaciones0 comentarios
Admin
- 20 ago 2018
- 1 min.
Why build a stellar photometer?
Building a stellar photometer clearly goes against the current trend. Almost all amateur photometrists use CCD cameras, and yet I have...
165 visualizaciones0 comentarios
Admin
- 1 ago 2018
- 2 min.
Total moon eclipse at the planetarium
During the total eclipse of the moon on July 27, 2018, the Madrid Planetarium organized an observation in its esplanade with telescopes...
15 visualizaciones0 comentarios
Admin
- 4 feb 2018
- 1 min.
Measurement of sky quality based on the analysis of the image of the AllSky camera
The images that the AllSky camera captures are a great help to know the current state of the sky. Being the camera in color we can...
80 visualizaciones0 comentarios
Admin
- 20 ene 2018
- 2 min.
Variable stars discovered with the Mini Observatory
During the months of November and December 2017, I dedicated the newly built Mini Observatory to the search for variable stars, finding 6...
15 visualizaciones0 comentarios
Admin
- 9 dic 2017
- 2 min.
Put the camera in the suitcase!, sometimes the stars are in your favor
On the occasion of a work trip to Helsinki, Finland, I decided to take the Canon 60Da camera and the tripod to the suitcase. I did not...
11 visualizaciones0 comentarios
Admin
- 7 dic 2017
- 1 min.
Design and assembly of a mini terrace observatory
I have completed the design and assembly of a mini terrace observatory. With this system I have a second operational telescope using an...
233 visualizaciones0 comentarios
Admin
- 20 sept 2017
- 6 min.
Solar eclipse on August 21, 2017 in the US
The eclipse of August 21, 2017 was more than an astronomical event. In South Carolina there was no store without a sign referring to the...
24 visualizaciones0 comentarios
Admin
- 10 ago 2017
- 1 min.
Lunar Eclipse on August 7, 2017
From Cádiz I have been able to observe and make some photographs of the partial lunar eclipse on August 7, 2017. From this latitude, the...
6 visualizaciones0 comentarios
Admin
- 26 jun 2016
- 2 min.
Testing the C11 to the limit in urban environment. Arp 104 / Keenan System.
A complicated objective of photographing with 11" telescope aperture and in urban environment is the intergalactic bridge between the...
31 visualizaciones0 comentarios
Admin
- 14 may 2016
- 1 min.
Transit of Mercury
On 9/5/2016 the weather in Majadahonda gave prediction that it would not be possible to see the transit of Mercury. And so it was until...
10 visualizaciones0 comentarios
Admin
- 24 abr 2016
- 1 min.
Giant sunspot
The sunspot called AR 2529 came into view on April 7, 2016. The photograph shows his status on April 9. Sunspots are regions of very high...
5 visualizaciones0 comentarios
Admin
- 7 feb 2016
- 1 min.
Photo of supernova discovered on 1/19/2016
Supernova recently discovered in IC2207 with magnitude 17.5. The photo has been made with 14 stacked shots of 300s with LX200 8" and...
3 visualizaciones0 comentarios
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