{
 "about": "Made by src/journeys/chapters/galaxies/tools/make_cosmic_scales.py. Positions in the display frame (see the tool), int16 units of 0.1 million light-years, light-travel distances (H0 74.6, Omega_m 0.3).",
 "unit_mly": 0.1,
 "frame": "display: +Y = RA 185 Dec 0, +Z = celestial north pole, X = Y x Z",
 "eq_to_display": [
  [
   -0.08715574,
   0.9961947,
   0.0
  ],
  [
   -0.9961947,
   -0.08715574,
   0.0
  ],
  [
   0.0,
   0.0,
   1.0
  ]
 ],
 "groups": {
  "count": 37998,
  "in_laniakea": 3451,
  "max_mly": 1318.860856441437,
  "source": "cf4_tully_2023"
 },
 "places": {
  "virgo": {
   "name": "Virgo Cluster",
   "pos_mly": [
    -3.32,
    67.23,
    13.68
   ],
   "dist_mly": 68.7,
   "v3k": 1577,
   "pgc": 41440,
   "members": 1,
   "sep_deg": 0.91,
   "in_laniakea": true
  },
  "coma": {
   "name": "Coma Cluster",
   "pos_mly": [
    -46.27,
    269.14,
    144.78
   ],
   "dist_mly": 309.1,
   "v3k": 7193,
   "pgc": 44715,
   "members": 263,
   "sep_deg": 0.18,
   "in_laniakea": false
  },
  "perseus": {
   "name": "Perseus-Pisces",
   "pos_mly": [
    118.27,
    -119.9,
    148.99
   ],
   "dist_mly": 224.9,
   "v3k": 5208,
   "pgc": 12429,
   "members": 51,
   "sep_deg": 0.25,
   "in_laniakea": false
  },
  "shapley": {
   "name": "Shapley Supercluster",
   "pos_mly": [
    -155.25,
    503.99,
    -326.59
   ],
   "dist_mly": 620.3,
   "v3k": 14695,
   "pgc": 47202,
   "members": 107,
   "sep_deg": 0.31,
   "in_laniakea": false
  },
  "norma": {
   "name": "Norma Cluster",
   "pos_mly": [
    -90.36,
    54.73,
    -190.92
   ],
   "dist_mly": 218.2,
   "v3k": 5052,
   "pgc": 57612,
   "members": 5,
   "sep_deg": 0.17,
   "in_laniakea": true
  },
  "centaurus": {
   "name": "Centaurus Cluster",
   "pos_mly": [
    -8.37,
    103.36,
    -96.21
   ],
   "dist_mly": 141.5,
   "v3k": 3261,
   "pgc": 42246,
   "members": 1,
   "sep_deg": 2.46,
   "in_laniakea": true
  },
  "hydra": {
   "name": "Hydra Cluster",
   "pos_mly": [
    58.94,
    131.84,
    -79.57
   ],
   "dist_mly": 164.9,
   "v3k": 3806,
   "pgc": 31981,
   "members": 1,
   "sep_deg": 2.03,
   "in_laniakea": true
  },
  "attractor": {
   "name": "Great Attractor",
   "pos_mly": [
    -97.65,
    117.56,
    -138.7
   ],
   "dist_mly": 206.4,
   "sg_hmpc": [
    -45.6,
    11.2,
    8.8
   ],
   "note": "where our own streamline in the CF4++ flow slows below 150 km/s (the bottom of our basin)"
  },
  "sloan_wall": {
   "name": "Sloan Great Wall",
   "pos_mly": [
    -51.3,
    923.3,
    4.9
   ],
   "dist_mly": 925,
   "galaxies": 6843
  },
  "two_gly": {
   "name": "2 billion light-years",
   "radius_mly": 2000.0
  }
 },
 "flows": {
  "lines": 480,
  "points": 15493,
  "ours": 206,
  "source": "cf4pp_courtois_2025",
  "seeds": 900,
  "agree_with_shell": 0.919
 },
 "shell": {
  "vertices": 2376,
  "triangles": 4748,
  "extent_mly": [
   991,
   744,
   632
  ],
  "cells": 4079,
  "volume_hmpc3": 1945019,
  "source": "dupuy_courtois_2023"
 },
 "sdss": {
  "count": 49019,
  "z_max": 0.2,
  "max_mly": 2282,
  "source": "sdss_dr17",
  "query": "SELECT s.specObjID, s.ra, s.dec, s.z, p.modelMag_g, p.modelMag_r FROM SpecObj s JOIN PhotoObj p ON s.bestObjID = p.objID WHERE s.class='GALAXY' AND s.zWarning=0 AND s.z BETWEEN 0.005 AND 0.25 AND s.dec BETWEEN -3 AND 3 AND s.ra BETWEEN 100 AND 270 AND (s.legacy_target1 & 64) > 0 (then z <= 0.20)"
 }
}