diff --git a/VERSION b/VERSION
index 537aabf..0fab938 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.0-beta
\ No newline at end of file
+1.0.0-rc3
\ No newline at end of file
diff --git a/config.yml b/config.yml
index a5fcb7e..2e31ee9 100644
--- a/config.yml
+++ b/config.yml
@@ -102,7 +102,7 @@ targets:
     - type: 'planet'
       slug: 'earth'
       name: 'Earth'
-      title: 'Earth'
+      title: 'Earth (Coming NEXT!)'
       orbit:
         models:
           - slug: 'earth_orb_all'
diff --git a/web/static/js/swapp.js b/web/static/js/swapp.js
index 6fb8728..e2d78aa 100644
--- a/web/static/js/swapp.js
+++ b/web/static/js/swapp.js
@@ -132,22 +132,29 @@
       return results$;
     };
     SpaceWeather.prototype.enableTarget = function(target_slug){
-      var this$ = this;
+      var ref$, this$ = this;
       this.time_series.forEach(function(ts){
         if (ts.target.slug === target_slug && this$.parameters[ts.parameter].active) {
           return ts.show();
         }
       });
       this.targets[target_slug].active = true;
+      if ((ref$ = this.orbits) != null) {
+        ref$.showOrbiter(target_slug);
+      }
       return this;
     };
     SpaceWeather.prototype.disableTarget = function(target_slug){
+      var ref$;
       this.time_series.forEach(function(ts){
         if (ts.target.slug === target_slug) {
           return ts.hide();
         }
       });
       this.targets[target_slug].active = false;
+      if ((ref$ = this.orbits) != null) {
+        ref$.hideOrbiter(target_slug);
+      }
       return this;
     };
     SpaceWeather.prototype.resize = function(){
@@ -706,9 +713,10 @@
       this.data = {};
       this.orbiters = {};
       this.orbitersElements = {};
-      this.extremum = 1;
-      this.xScale = d3.scaleLinear().domain([-1 * this.extremum, this.extremum]);
-      this.yScale = d3.scaleLinear().domain([this.extremum, -1 * this.extremum]);
+      this.orbitersExtrema = {};
+      this.lastOrbiterData = {};
+      this.xScale = d3.scaleLinear().domain([-1, 1]);
+      this.yScale = d3.scaleLinear().domain([1, -1]);
       this.xAxis = d3.axisBottom().ticks(10);
       this.yAxis = d3.axisLeft().ticks(10);
       this.svg = d3.select(this.container).append('svg');
@@ -738,11 +746,6 @@
       if (slug in this.orbitersElements) {
         throw new Error("Second init of " + slug);
       }
-      this.extremum = Math.max(this.extremum, 1.11 * d3.max(data, function(d){
-        return Math.max(Math.abs(d.x), Math.abs(d.y));
-      }));
-      this.xScale = d3.scaleLinear().domain([-1 * this.extremum, this.extremum]);
-      this.yScale = d3.scaleLinear().domain([-1 * this.extremum, this.extremum]);
       orbit_ellipse = this.plotWrapper.append("svg:ellipse").classed('orbit orbit_ellipse', true);
       orbiter = this.plotWrapper.append("svg:image").attr('xlink:href', config['img']).attr('width', '32px').attr('height', '32px');
       orbiter.append('svg:title').text(config.name);
@@ -752,65 +755,122 @@
         return this$.yScale(d.x);
       });
       orbit_section = this.plotWrapper.append('path').datum(data).classed('orbit orbit_section', true);
-      this.orbiters[slug] = config;
       this.data[slug] = data;
+      this.orbiters[slug] = config;
       this.orbitersElements[slug] = {
         orbiter: orbiter,
         orbit_ellipse: orbit_ellipse,
         orbit_section: orbit_section,
         orbit_line: orbit_line
       };
-      this.resize();
+      this.orbitersExtrema[slug] = d3.max(data, function(d){
+        return Math.max(Math.abs(d.x), Math.abs(d.y));
+      });
       $(this.svg.node()).show();
+      this.resize(true);
       return this;
     };
+    Orbits.prototype.showOrbiter = function(slug){
+      this.orbiters[slug].hidden = false;
+      this.orbitersElements[slug].orbiter.style("display", null);
+      this.orbitersElements[slug].orbit_ellipse.style("display", null);
+      this.orbitersElements[slug].orbit_section.style("display", null);
+      return this.resize(true);
+    };
+    Orbits.prototype.hideOrbiter = function(slug){
+      this.orbiters[slug].hidden = true;
+      this.orbitersElements[slug].orbiter.style("display", "none");
+      this.orbitersElements[slug].orbit_ellipse.style("display", "none");
+      this.orbitersElements[slug].orbit_section.style("display", "none");
+      return this.resize(true);
+    };
     Orbits.prototype.clear = function(){
       return $(this.svg.node()).remove();
     };
-    Orbits.prototype.resize = function(){
-      var width, height, slug, ref$, config;
+    Orbits.prototype.resize = function(animate){
+      var width, height, extremum, s, o, slug, ref$, config, t, t1, this$ = this;
+      animate == null && (animate = false);
       width = Math.ceil($(this.container).width() - this.margin.left - this.margin.right);
       height = Math.ceil(1.0 * width);
       console.debug("Resizing orbits : " + width + " × " + height + "…");
+      extremum = 1.1 * d3.max((function(){
+        var ref$, results$ = [];
+        for (s in ref$ = this.orbiters) {
+          o = ref$[s];
+          if (!o.hidden) {
+            results$.push(s);
+          }
+        }
+        return results$;
+      }.call(this)), function(d){
+        return this$.orbitersExtrema[d];
+      });
+      this.xScale = d3.scaleLinear().domain([-1 * extremum, extremum]);
+      this.yScale = d3.scaleLinear().domain([extremum, -1 * extremum]);
       this.xScale.range([0, width]);
-      this.yScale.range([0, height]);
+      this.yScale.range([height, 0]);
       this.svg.attr('width', width + this.margin.right + this.margin.left).attr('height', height + this.margin.top + this.margin.bottom);
       this.sun.attr("x", width / 2 - 16).attr("y", height / 2 - 16);
       for (slug in ref$ = this.orbiters) {
         config = ref$[slug];
-        this.resizeOrbiter(slug, config, width, height);
+        this.resizeOrbiter(slug, config, width, height, animate);
       }
       this.xAxis.scale(this.xScale);
       this.yAxis.scale(this.yScale);
-      this.svg.select('.x.axis').attr('transform', 'translate(0,' + height + ')').call(this.xAxis);
-      this.svg.select('.y.axis').call(this.yAxis);
+      this.svg.select('.x.axis').attr('transform', 'translate(0,' + height + ')');
+      if (animate) {
+        t = this.svg.transition().duration(750);
+        t1 = this.svg.transition().duration(4750);
+        this.svg.select('.x.axis').transition(t).call(this.xAxis);
+        this.svg.select('.y.axis').transition(t).call(this.yAxis);
+      } else {
+        this.svg.select('.x.axis').call(this.xAxis);
+        this.svg.select('.y.axis').call(this.yAxis);
+      }
       this.xAxisTitle.attr("x", width / 2).attr("y", 37);
       this.yAxisTitle.attr("x", -1 * height / 2).attr("y", -30);
       return this;
     };
-    Orbits.prototype.resizeOrbiter = function(slug, config, width, height){
-      var el, a, b, c, cx, cy, data;
+    Orbits.prototype.resizeOrbiter = function(slug, config, width, height, animate){
+      var tt, el, orbit_section, t, a, b, c, cx, cy, orbit_ellipse;
+      animate == null && (animate = false);
       console.debug("Resizing orbit of " + slug + "…");
+      tt = this.svg.transition().duration(750);
       el = this.orbitersElements[slug];
-      el['orbit_section'].attr('d', el['orbit_line']);
+      orbit_section = el['orbit_section'];
+      if (animate) {
+        t = this.svg.transition().duration(750);
+        orbit_section = orbit_section.transition(tt);
+      }
+      orbit_section.attr('d', el['orbit_line']);
       a = config['orbit']['a'];
       b = config['orbit']['b'];
       c = Math.sqrt(a * a - b * b);
       cx = width / 2 - c;
       cy = height / 2;
-      el['orbit_ellipse'].attr('cx', cx).attr('cy', cy).attr('rx', this.xScale(a) - this.xScale(0)).attr('ry', this.yScale(b) - this.yScale(0));
-      data = this.data[slug];
-      el['orbiter'].attr('x', this.xScale(data[data.length - 1].y) - 16);
-      el['orbiter'].attr('y', this.yScale(data[data.length - 1].x) - 16);
+      orbit_ellipse = el['orbit_ellipse'];
+      if (animate) {
+        t = this.svg.transition().duration(750);
+        orbit_ellipse = orbit_ellipse.transition(t);
+      }
+      orbit_ellipse.attr('cx', cx).attr('cy', cy).attr('rx', this.xScale(a) - this.xScale(0)).attr('ry', this.yScale(b) - this.yScale(0));
+      this.repositionOrbiter(slug, null, true);
       return this;
     };
-    Orbits.prototype.repositionOrbiter = function(slug, datum){
-      var data, el;
+    Orbits.prototype.repositionOrbiter = function(slug, datum, animate){
+      var data, el, t;
+      animate == null && (animate = false);
       data = this.data[slug];
+      datum == null && (datum = this.lastOrbiterData[slug]);
       datum == null && (datum = data[data.length - 1]);
-      el = this.orbitersElements[slug];
-      el['orbiter'].attr('x', this.xScale(datum.y) - 16);
-      el['orbiter'].attr('y', this.yScale(datum.x) - 16);
+      this.lastOrbiterData[slug] = datum;
+      el = this.orbitersElements[slug]['orbiter'];
+      if (animate) {
+        t = this.svg.transition().duration(750);
+        el = el.transition(t);
+      }
+      el.attr('x', this.xScale(datum.y) - 16);
+      el.attr('y', this.yScale(datum.x) - 16);
       return this;
     };
     Orbits.prototype.bisectDate = d3.bisector(function(d){
diff --git a/web/static/js/swapp.ls b/web/static/js/swapp.ls
index 668b8ce..f288985 100644
--- a/web/static/js/swapp.ls
+++ b/web/static/js/swapp.ls
@@ -128,11 +128,13 @@ https://gitlab.irap.omp.eu/CDPP/SPACEWEATHERONLINE
   enableTarget: (target_slug) ->
     @time_series.forEach((ts) ~> ts.show() if ts.target.slug == target_slug && @parameters[ts.parameter].active)
     @targets[target_slug].active = true
+    @orbits?.showOrbiter target_slug
     this
 
   disableTarget: (target_slug) ->
     @time_series.forEach((ts) -> ts.hide() if ts.target.slug == target_slug)
     @targets[target_slug].active = false
+    @orbits?.hideOrbiter target_slug
     this
 
   resize: ->
@@ -656,10 +658,11 @@ export class Orbits
 
     @data = {}  # slug => HEE array
     @orbiters = {}  # slug => config
-    @orbitersElements = {}
-    @extremum = 1
-    @xScale = d3.scaleLinear().domain([-1 * @extremum, @extremum])
-    @yScale = d3.scaleLinear().domain([@extremum, -1 * @extremum])
+    @orbitersElements = {}  # see initOrbiter
+    @orbitersExtrema = {}  # slug => local extrema
+    @lastOrbiterData = {}  # slug => most recently used datum for position
+    @xScale = d3.scaleLinear().domain([-1, 1])
+    @yScale = d3.scaleLinear().domain([1, -1])
 
     @xAxis = d3.axisBottom().ticks(10)
     @yAxis = d3.axisLeft().ticks(10)
@@ -700,12 +703,6 @@ export class Orbits
     console.info "Initializing orbit of #{config.name}…"
     if slug of @orbitersElements then throw new Error("Second init of #{slug}")
 
-    @extremum = Math.max(@extremum, 1.11 * d3.max(data, (d) ->
-      Math.max(Math.abs(d.x), Math.abs(d.y))
-    ))
-    @xScale = d3.scaleLinear().domain([-1 * @extremum, @extremum])
-    @yScale = d3.scaleLinear().domain([-1 * @extremum, @extremum])
-
     # The order is important, as it will define the default z-order
     orbit_ellipse = @plotWrapper.append("svg:ellipse")
                                 .classed('orbit orbit_ellipse', true)
@@ -722,31 +719,54 @@ export class Orbits
                                 .datum(data)
                                 .classed('orbit orbit_section', true)
 
-    @orbiters[slug] = config
     @data[slug] = data
+    @orbiters[slug] = config
     @orbitersElements[slug] =
       orbiter: orbiter
       orbit_ellipse: orbit_ellipse
       orbit_section: orbit_section
       orbit_line: orbit_line
-
-    @resize()
+    @orbitersExtrema[slug] = d3.max(data, (d) ->
+      Math.max(Math.abs(d.x), Math.abs(d.y))
+    )
 
     $(@svg.node()).show();
 
+    @resize(true)
+
     this
 
+  showOrbiter: (slug) ->
+    @orbiters[slug].hidden = false
+    @orbitersElements[slug].orbiter.style("display", null)
+    @orbitersElements[slug].orbit_ellipse.style("display", null)
+    @orbitersElements[slug].orbit_section.style("display", null)
+    @resize(true)
+
+  hideOrbiter: (slug) ->
+    @orbiters[slug].hidden = true
+    @orbitersElements[slug].orbiter.style("display", "none")
+    @orbitersElements[slug].orbit_ellipse.style("display", "none")
+    @orbitersElements[slug].orbit_section.style("display", "none")
+    @resize(true)
+
   clear: ->
     $(@svg.node()).remove()
 
-  resize: ->
+  resize: (animate = false) ->
     width = Math.ceil($(@container).width() - @margin.left - @margin.right)
     height = Math.ceil(1.0 * width)
 
     console.debug("Resizing orbits : #{width} × #{height}…")
 
+    extremum = 1.1 * d3.max([s for s, o of @orbiters when not o.hidden], (d) ~>
+      @orbitersExtrema[d]
+    )
+    @xScale = d3.scaleLinear().domain([-1 * extremum, extremum])
+    @yScale = d3.scaleLinear().domain([extremum, -1 * extremum])
+
     @xScale.range([0, width])
-    @yScale.range([0, height])
+    @yScale.range([height, 0])
 
     @svg.attr('width',  width + @margin.right + @margin.left)
         .attr('height', height + @margin.top + @margin.bottom)
@@ -754,17 +774,20 @@ export class Orbits
     @sun.attr("x", width / 2 - 16).attr("y", height / 2 - 16)
 
     for slug, config of @orbiters
-      @resizeOrbiter(slug, config, width, height)
+      @resizeOrbiter(slug, config, width, height, animate)
 
     @xAxis.scale(@xScale)
     @yAxis.scale(@yScale)
 
-    @svg.select('.x.axis')
-        .attr('transform', 'translate(0,' + height + ')')
-        .call(@xAxis)
-
-    @svg.select('.y.axis')
-        .call(@yAxis)
+    @svg.select('.x.axis').attr('transform', 'translate(0,' + height + ')')
+    if animate
+      t = @svg.transition().duration(750)
+      t1 = @svg.transition().duration(4750)
+      @svg.select('.x.axis').transition(t).call(@xAxis);
+      @svg.select('.y.axis').transition(t).call(@yAxis);
+    else
+      @svg.select('.x.axis').call(@xAxis)
+      @svg.select('.y.axis').call(@yAxis)
 
     @xAxisTitle.attr("x", width / 2)
                .attr("y", 37)
@@ -773,35 +796,49 @@ export class Orbits
 
     this
 
-  resizeOrbiter: (slug, config, width, height) ->
+  resizeOrbiter: (slug, config, width, height, animate = false) ->
     console.debug("Resizing orbit of #{slug}…")
 
+    tt = @svg.transition().duration(750)
     el = @orbitersElements[slug]
-    el['orbit_section'].attr('d', el['orbit_line'])
+    orbit_section = el['orbit_section']
+    if animate
+      t = @svg.transition().duration(750)
+      orbit_section = orbit_section.transition(tt)
+    orbit_section.attr('d', el['orbit_line'])
 
     a = config['orbit']['a']
     b = config['orbit']['b']
     c = Math.sqrt(a*a - b*b)
     cx = (width / 2) - c
     cy = (height / 2)
-    el['orbit_ellipse'].attr('cx', cx).attr('cy', cy)
+
+    orbit_ellipse = el['orbit_ellipse']
+    if animate
+      t = @svg.transition().duration(750)
+      orbit_ellipse = orbit_ellipse.transition(t)
+    # These ellipses ain't worth much
+    # Maybe a simple circle whose radius is the mean radius of the orbit ?
+    orbit_ellipse.attr('cx', cx).attr('cy', cy)
         .attr('rx', @xScale(a) - @xScale(0))
         .attr('ry', @yScale(b) - @yScale(0))
 #        .attr('transform', 'rotate(66,'+(cx+c)+', '+cy+')')
 
-    data = @data[slug]
-
-    el['orbiter'].attr('x', @xScale(data[data.length - 1].y) - 16)
-    el['orbiter'].attr('y', @yScale(data[data.length - 1].x) - 16)
+    @repositionOrbiter(slug, null, true)
 
     this
 
-  repositionOrbiter: (slug, datum) ->
+  repositionOrbiter: (slug, datum, animate = false) ->
     data = @data[slug]
+    datum ?= @lastOrbiterData[slug]
     datum ?= data[data.length - 1]
-    el = @orbitersElements[slug]
-    el['orbiter'].attr('x', @xScale(datum.y) - 16)
-    el['orbiter'].attr('y', @yScale(datum.x) - 16)
+    @lastOrbiterData[slug] = datum
+    el = @orbitersElements[slug]['orbiter']
+    if animate
+      t = @svg.transition().duration(750)
+      el = el.transition(t)
+    el.attr('x', @xScale(datum.y) - 16)
+    el.attr('y', @yScale(datum.x) - 16)
     this
 
   bisectDate: d3.bisector((d) -> d.t).left
--
libgit2 0.21.2