update blurb

notebooks/sim_ephem/simulated_asteroid_ephem_rsp_horizons.ipynb

@@ -12,7 +12,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "This notebook retrieves the observations and orbital parameters of an object in DP0.3. We compare the ephemerides and coordinates from DP0.3 to the output from propagating the orbit."
+    "This notebook retrieves the observations and orbital parameters of an object in DP0.3. We compare the ephemerides and coordinates from DP0.3 to the JPL Horizons values."
    ]
   },
   {