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<!doctype html>
<html lang="fr">
<head>
<meta charset="UTF-8">
<title>Position des astres en explopitant l'API OpenData du système solaire</title>
<meta name="description" content="Position des astres en explopitant l'API OpenData du système solaire">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" type="image/png" href="favicon.ico">
<link rel="stylesheet" href="assets/css/font-awesome.min.css">
<link rel="stylesheet" href="assets/css/bootstrap.min.css">
<link rel="stylesheet" href="assets/css/bootsnav.min.css">
<link rel="stylesheet" href="assets/css/style.min.css">
<link rel="stylesheet" href="assets/css/responsive.min.css" />
<link rel="stylesheet" href="assets/css/position.css" />
<meta property="og:title" content="Position des astres en explopitant l'API OpenData du système solaire">
<meta property="og:type" content="website">
<meta property="og:url" content="https://api.le-systeme-solaire.net/position.html">
<meta property="og:image" content="https://api.le-systeme-solaire.net/assets/images/api.png">
<meta property="twitter:card" content="summary_large_image" />
<meta property="twitter:site" content="@systeme_solaire" />
<meta property="twitter:url" content="https://www.le-systeme-solaire.net/position.html" />
<meta property="twitter:title" content="L'OpenData du Système solaire" />
<meta property="twitter:description" content="Position des astres en explopitant l'API OpenData du système solaire" />
<meta property="twitter:image" content="https://api.le-systeme-solaire.net/assets/images/api.png" />
<link rel="canonical" href="https://api.le-systeme-solaire.net/position.html">
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "WebPage",
"headline": "Position des astres en explopitant l'API OpenData du système solaire",
"dateCreated": "2018-05-02",
"datePublished": "2025-09-04",
"dateModified": "2025-09-04",
"keywords": "OpenData, API",
"mainEntityOfPage": "https://api.le-systeme-solaire.net",
"url": "https://api.le-systeme-solaire.net/position.html",
"image": [
"https://api.le-systeme-solaire.net/assets/images/api.png"
],
"author": {
"@type": "Organization",
"name": "Christophe"
},
"publisher": {
"@type": "Organization",
"name": "Christophe",
"logo": {
"@type": "ImageObject",
"url": "https://api.le-systeme-solaire.net/assets/images/api.png"
}
},
"description": "Position des astres en explopitant l'API OpenData du système solaire"
}
</script>
</head>
<body>
<div class="culmn">
<nav class="navbar navbar-default bootsnav navbar-fixed white ">
<div class="container">
<div class="attr-nav">
<ul>
<li><a href="/en/position.html" title="English version" class="font-weight">En</a></li>
<li><a href="https://github.com/systeme-solaire" target="_blank"><i class="fa fa-github"></i></a></li>
<li><a href="https://www.facebook.com/le.systeme.solaire" target="_blank"><i class="fa fa-facebook"></i></a></li>
<li><a href="https://twitter.com/systeme_solaire" target="_blank"><i class="fa fa-twitter"></i></a></li>
<li><a href="https://www.le-systeme-solaire.net" class="syssollinkmini"></a></li>
</ul>
</div>
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-menu">
<i class="fa fa-bars"></i>
</button>
<a class="navbar-brand" href="https://api.le-systeme-solaire.net">
<img src="assets/images/logo.png" class="logo logo-scrolled" alt="L'OpenData du Système solaire">
</a>
</div>
<div class="collapse navbar-collapse" id="navbar-menu">
<ul class="nav navbar-nav navbar-center">
<li></li>
</ul>
</div>
</div>
</nav>
<section id="home" class="home">
<div class="container">
<div class="row">
<div class="main_home">
<div class="col-md-6">
<div class="home_text">
<h1 class="text-white">Positions astronomiques des astres</h1>
<p class="text-white">Calcul des positions du Soleil, de la Lune et des planètes en temps réel.</p>
<p class="text-white">Démo du endpoint https://api.le-systeme-solaire.net/rest/positions.</p>
<p class="text-white">Par défaut, vous êtes à Clermont-Ferrand, France.</p>
</div>
</div>
</div>
</div>
</div>
</section>
<section id="features" class="features">
<div class="container">
<div class="row">
<div class="main_features p-top-30">
<div class="col-md-8 col-md-offset-2 col-sm-12">
<div class="head_title text-center">
<h2>Votre position</h2>
<h5>Indiquez précisement le lieu et l'heure UTC de l'observation</h5>
</div>
</div>
<div class="controls">
<div class="form-grid">
<div class="col-md-4 form-group">
<label for="latitude">Latitude (°)</label>
<input type="number" id="latitude" step="0.000001" value="45.783552" placeholder="45.783552">
</div>
<div class="col-md-4 form-group">
<label for="longitude">Longitude (°)</label>
<input type="number" id="longitude" step="0.000001" value="3.071572" placeholder="3.071572">
</div>
<div class="col-md-4 form-group">
<label for="altitude">Altitude (m)</label>
<input type="number" id="altitude" value="406" placeholder="406">
</div>
<div class="col-md-4 form-group">
<label for="timezone">Zone horaire (UTC+)</label>
<input type="number" id="timezone" step="1" value="2" placeholder="2">
<small class="legendmini">
Votre décalage UTC actuel.<br>
Ex: France été=+2, hiver=+1, New York=-5/-4, Tokyo=+9
</small>
</div>
<div class="col-md-4 form-group">
<label for="datetime">Date et heure (UTC/GMT)</label>
<input type="datetime-local" id="datetime" style="padding:2px">
<small class="legendmini" id="timezone-info">
Heure UTC (temps universel coordonné)
</small>
</div>
<div class="col-md-4 form-group">
<label for="location-preset">Lieux prédéfinis</label>
<select id="location-preset">
<option value="">Choisir un lieu...</option>
<option value="clermont">Clermont-Ferrand, France</option>
<option value="paris">Paris, France</option>
<option value="london">Londres, Royaume-Uni</option>
<option value="newyork">New York, USA</option>
<option value="tokyo">Tokyo, Japon</option>
<option value="sydney">Sydney, Australie</option>
</select>
</div>
</div>
</div>
</div>
</div>
<div class="row">
<div>
<div class="col-md-12 text-center">
<button class="btn btn-access" onclick="calculatePositions()">
Calculer les positions
</button>
<button class="btn btn-swagger" onclick="setCurrentTime()">
Maintenant
</button>
</div>
<div class="loading" id="loading">
<div class="spinner"></div>
<p>Calcul des positions astronomiques en cours...</p>
</div>
<div class="error" id="error" style="display: none;"></div>
</div>
</div>
<div class="row">
<div>
<div class="info-panel" id="info-panel"></div>
</div>
</div>
<div class="row">
<div>
<div class="positions-grid" id="positions-grid"></div>
</div>
<script>
let autoRefreshInterval = null;
// Initialisation au chargement de la page
window.onload = function() {
detectUserTimezone();
setCurrentTime();
setupLocationPresets();
};
function detectUserTimezone() {
const now = new Date();
const localOffset = now.getTimezoneOffset(); // en minutes, NÉGATIF pour UTC+
const utcOffset = -localOffset / 60; // Conversion en heures, signe inversé pour avoir la vraie zone
// Tentative de détection du nom du fuseau horaire (navigateurs modernes)
let timezoneName = 'Inconnu';
try {
timezoneName = Intl.DateTimeFormat().resolvedOptions().timeZone;
} catch (e) {
// Fallback pour les navigateurs plus anciens
timezoneName = `UTC${utcOffset >= 0 ? '+' : ''}${utcOffset}`;
}
// Vérification avec un exemple concret
const utcTime = now.toISOString().slice(0,16).replace('T', ' ');
const localTime = now.toLocaleString('fr-FR', {hour12: false});
// Mise à jour de l'affichage
const timezoneInfo = document.getElementById('timezone-info');
timezoneInfo.innerHTML = `
Votre fuseau détecté: ${timezoneName} (UTC${utcOffset >= 0 ? '+' : ''}${utcOffset})<br>
<span style="font-size: 0.6rem;">Ex: ${utcTime} UTC + ${utcOffset}h = ${localTime} locale</span>
`;
// Suggestion automatique du fuseau horaire
const timezoneField = document.getElementById('timezone');
if (timezoneField.value == "2") { // Si c'est encore la valeur par défaut
timezoneField.value = utcOffset;
}
}
function setCurrentTime() {
const now = new Date();
// Obtenir l'heure UTC directement
const year = now.getUTCFullYear();
const month = String(now.getUTCMonth() + 1).padStart(2, '0');
const day = String(now.getUTCDate()).padStart(2, '0');
const hours = String(now.getUTCHours()).padStart(2, '0');
const minutes = String(now.getUTCMinutes()).padStart(2, '0');
const datetimeString = `${year}-${month}-${day}T${hours}:${minutes}`;
document.getElementById('datetime').value = datetimeString;
// Afficher des informations de debug sur les fuseaux horaires
const localOffset = now.getTimezoneOffset(); // en minutes, négatif pour UTC+
const utcOffset = -localOffset / 60; // Conversion en heures, signe inversé
// Suggérer automatiquement le fuseau horaire de l'utilisateur
const timezoneField = document.getElementById('timezone');
if (timezoneField.value == "1") { // Si c'est encore la valeur par défaut
timezoneField.value = utcOffset;
}
}
function setupLocationPresets() {
const locations = {
// Attention: utiliser le décalage UTC ACTUEL (avec été/hiver selon saison)
'clermont': { lat: 45.783552, lon: 3.071572, alt: 406, tz: 2, name: 'Clermont-Ferrand, France (été)' },
'paris': { lat: 48.8566, lon: 2.3522, alt: 35, tz: 2, name: 'Paris, France (été)' },
'london': { lat: 51.5074, lon: -0.1278, alt: 11, tz: 1, name: 'Londres, Royaume-Uni (été)' },
'newyork': { lat: 40.7128, lon: -74.0060, alt: 57, tz: -4, name: 'New York, USA (été)' },
'tokyo': { lat: 35.6762, lon: 139.6503, alt: 6, tz: 9, name: 'Tokyo, Japon' },
'sydney': { lat: -33.8688, lon: 151.2093, alt: 58, tz: 10, name: 'Sydney, Australie' }
};
document.getElementById('location-preset').addEventListener('change', function() {
const selected = this.value;
if (selected && locations[selected]) {
const loc = locations[selected];
document.getElementById('latitude').value = loc.lat;
document.getElementById('longitude').value = loc.lon;
document.getElementById('altitude').value = loc.alt;
document.getElementById('timezone').value = loc.tz;
}
});
}
function showLoading() {
document.getElementById('loading').style.display = 'block';
document.getElementById('info-panel').style.display = 'none';
document.getElementById('positions-grid').style.display = 'none';
document.getElementById('error').style.display = 'none';
}
function hideLoading() {
document.getElementById('loading').style.display = 'none';
}
function showError(message) {
document.getElementById('error').textContent = message;
document.getElementById('error').style.display = 'block';
document.getElementById('info-panel').style.display = 'none';
document.getElementById('positions-grid').style.display = 'none';
}
function formatCoordinate(value, label) {
return `
<div class="coordinate-item">
<span class="coordinate-label">${label}</span>
<span class="coordinate-value">${value}</span>
</div>
`;
}
function displayResults(data) {
// Panneau d'informations
const infoPanel = document.getElementById('info-panel');
const location = data.location;
const timeInfo = data.time_info;
infoPanel.innerHTML = `
<div class="col-md-8 col-md-offset-2 col-sm-12">
<div class="head_title text-center">
<h2>Informations de l'observation</h2>
<h5>Vos données recalculées</h5>
</div>
</div>
<div class="col-md-6">
<span class="info-label">Heure UTC (calculée) :</span>
<span>${timeInfo.calculated_for_utc}</span>
</div>
<div class="col-md-6">
<span class="info-label">Heure locale (affichage) :</span>
<span>${timeInfo.local_time_display}</span>
</div>
<div class="col-md-6">
<span class="info-label">Temps Sidéral Greenwich :</span>
<span>${timeInfo.greenwich_sidereal_time} (${timeInfo.gst_decimal}h)</span>
</div>
<div class="col-md-6">
<span class="info-label">Temps Sidéral Local :</span>
<span>${timeInfo.local_sidereal_time} (${timeInfo.lst_decimal}h)</span>
</div>
<div class="col-md-6">
<span class="info-label">Date Julienne :</span>
<span>${timeInfo.julian_day}</span>
</div>
<div class="col-md-6">
<span class="info-label">Jour J2000.0 :</span>
<span>${timeInfo.day_number_j2000}</span>
</div>
<div class="col-md-6">
<span class="info-label">Latitude :</span>
<span>${location.latitude.toFixed(6)}°</span>
</div>
<div class="col-md-6">
<span class="info-label">Longitude :</span>
<span>${location.longitude.toFixed(6)}°</span>
</div>
<div class="col-md-6">
<span class="info-label">Altitude :</span>
<span>${location.elevation} m</span>
</div>
<div class="col-md-6">
<span class="info-label">Zone horaire :</span>
<span>UTC${location.timezone >= 0 ? '+' : ''}${location.timezone}</span>
</div>
`;
// Grille des positions
const positionsGrid = document.getElementById('positions-grid');
positionsGrid.innerHTML = `
<div class="col-md-8 col-md-offset-2 col-sm-12">
<div class="head_title text-center">
<h2>Position des astres</h2>
</div>
</div>
`;
data.positions.forEach(position => {
const blockcard = document.createElement('div');
blockcard.className = 'col-md-6';
blockcard.innerHTML = '';
const card = document.createElement('div');
card.className = 'celestial-card';
card.innerHTML = `
<div class="celestial-header">
<span class="celestial-name">${position.name}</span>
</div>
<div class="coordinates">
${formatCoordinate(position.ra, 'Ascension Droite')}
${formatCoordinate(position.dec, 'Déclinaison')}
${formatCoordinate(position.az, 'Azimut')}
${formatCoordinate(position.alt, 'Altitude')}
</div>
`;
blockcard.appendChild(card);
positionsGrid.appendChild(blockcard);
});
document.getElementById('info-panel').style.display = 'block';
document.getElementById('positions-grid').style.display = 'block';
}
async function calculatePositions() {
showLoading();
try {
const requestData = {
lat: parseFloat(document.getElementById('latitude').value),
lon: parseFloat(document.getElementById('longitude').value),
elev: parseFloat(document.getElementById('altitude').value),
zone: parseFloat(document.getElementById('timezone').value),
datetime: document.getElementById('datetime').value+":00"
};
// Validation des données
if (isNaN(requestData.lat) || requestData.lat < -90 || requestData.lat > 90) {
throw new Error('Latitude invalide (doit être entre -90 et 90)');
}
if (isNaN(requestData.lon) || requestData.lon < -180 || requestData.lon > 180) {
throw new Error('Longitude invalide (doit être entre -180 et 180)');
}
if (!requestData.datetime) {
throw new Error('Date et heure requises');
}
if (!requestData.elev) {
throw new Error('Altitude requises');
}
const response = await fetch('proxy_api.php', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify(requestData)
});
if (!response.ok) {
throw new Error(`Erreur HTTP: ${response.status} ${response.statusText}`);
}
const responseText = await response.text();
let data;
try {
data = JSON.parse(responseText);
} catch (parseError) {
throw new Error('Réponse invalide du serveur: ' + responseText.substring(0, 100) + '...');
}
hideLoading();
displayResults(data);
} catch (error) {
hideLoading();
showError('Erreur: ' + error.message);
}
}
// Calcul initial au chargement (avec délai pour laisser le temps au DOM de se charger)
setTimeout(() => {
calculatePositions();
}, 1000);
// Gestion du raccourci clavier
document.addEventListener('keydown', function(event) {
if (event.ctrlKey && event.key === 'Enter') {
calculatePositions();
}
});
// Validation en temps réel des inputs
document.getElementById('latitude').addEventListener('input', function() {
const value = parseFloat(this.value);
if (value < -90 || value > 90) {
this.style.borderColor = 'red';
} else {
this.style.borderColor = '';
}
});
document.getElementById('longitude').addEventListener('input', function() {
const value = parseFloat(this.value);
if (value < -180 || value > 180) {
this.style.borderColor = 'red';
} else {
this.style.borderColor = '';
}
});
</script>
</div>
</div>
</section>
<div class="scrollup">
<a href="#"><i class="fa fa-chevron-up"></i></a>
</div>
<footer id="footer" class="footer bg-black m-top-100">
<div class="container">
<div class="row">
<div class="col-md-12">
<nav class="navbar navbar-default bootsnav footer-menu no-background">
<div class="container">
<div class="syssollink">
<p>Par le même auteur : <a href="https://www.le-systeme-solaire.net">Le Système solaire à portée de votre souris</a>.</p>
</div>
</div>
</nav>
</div>
<div class="divider"></div>
<div class="col-md-12">
<div class="main_footer text-center p-top-40 p-bottom-30">
<p class="wow fadeInRight" data-wow-duration="1s">
Fait avec <span class="text-danger">♥</span> en <img src="/assets/images/auvergne.png" class="auvergne" alt="Auvergne"> par Christophe - Copyright © 2019-<script>document.write(new Date().getFullYear());</script> Tous droits réservés
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