diff --git a/src/app/features/galaxy-system/system-framing.spec.ts b/src/app/features/galaxy-system/system-framing.spec.ts
index 4bd2c68..bcda348 100644
--- a/src/app/features/galaxy-system/system-framing.spec.ts
+++ b/src/app/features/galaxy-system/system-framing.spec.ts
@@ -18,6 +18,8 @@ import {
 const TRAPPIST_1 = { innermost: 0.01154, outermost: 0.06189 };
 const GL_357 = { innermost: 0.035, outermost: 0.204 };
 const SOLAR = { innermost: 0.387, outermost: 30.07 };
+/** The solar system as the map draws it: out to Eris's semi-major axis, 67.93 AU. */
+const SOLAR_TO_ERIS = { innermost: 0.387, outermost: 67.93 };
 
 describe('starMarkerRadiusAu', () => {
   it('never reaches the innermost orbit', () => {
@@ -123,14 +125,15 @@ describe('the grid and the framing together', () => {
   const VIEWPORTS: SystemViewport[] = [
     { fovDegrees: 50, aspect: 1.78 },
     { fovDegrees: 50, aspect: 1 },
-    { fovDegrees: 50, aspect: 0.6 }
+    { fovDegrees: 50, aspect: 0.6 },
+    { fovDegrees: 50, aspect: 390 / 844 } // a phone held upright
   ];
 
   it('leaves the outermost ring clear of the frame edge at every scale and window shape', () => {
     // The whole point of framing against the grid rather than the orbits: before this, 368 of
     // the 371 systems in the datasets drew a grid wider than the view that was meant to hold it.
     for (const viewport of VIEWPORTS) {
-      for (const { outermost } of [TRAPPIST_1, GL_357, SOLAR, { outermost: 1 }, { outermost: 12.4 }]) {
+      for (const { outermost } of [TRAPPIST_1, GL_357, SOLAR, SOLAR_TO_ERIS, { outermost: 1 }, { outermost: 12.4 }]) {
         const { ring, frame } = fit(outermost, viewport);
         expect(ring).toBeLessThan(frame);
         expect(ring / frame).toBeLessThan(0.93);
diff --git a/src/app/features/galaxy-system/system-framing.ts b/src/app/features/galaxy-system/system-framing.ts
index a410df7..9395f26 100644
--- a/src/app/features/galaxy-system/system-framing.ts
+++ b/src/app/features/galaxy-system/system-framing.ts
@@ -61,13 +61,15 @@ const MIN_FRAMING_DISTANCE_AU = 0.06;
 /**
  * Ceiling on the framing distance, so a distant companion does not push the star to a dot.
  *
- * Generous enough to frame the solar system out to Pluto in any window shape, which needs 120 AU
- * on a landscape display and 140 on a portrait one once the camera's real field of view is
- * accounted for. Only genuinely pathological systems reach it now — the handful with
+ * Generous enough to frame the solar system out to Eris in any window a reader holds: its grid's
+ * outer ring, 80 AU, needs 192 AU on a landscape display and 416 on a 390 by 844 phone once the
+ * camera's real field of view is accounted for, and 500 holds it down to an aspect of 0.385. At
+ * 200, which framed Pluto's 40 AU ring, a portrait window arrived with Eris off screen, and a
+ * phone with Makemake too. Only genuinely pathological systems reach it now — the handful with
  * directly-imaged companions hundreds of AU out — and those still arrive framed on their inner
  * region, with the orbit controls reaching far enough to pull back to the rest.
  */
-const MAX_FRAMING_DISTANCE_AU = 200;
+const MAX_FRAMING_DISTANCE_AU = 500;
 
 /** Framing for a star with no known planets, where there is nothing to fit. */
 const EMPTY_SYSTEM_FRAMING_DISTANCE_AU = 3;