diff --git a/data/minormoons.ssc b/data/minormoons.ssc
index f0abe284..b5219aad 100644
--- a/data/minormoons.ssc
+++ b/data/minormoons.ssc
@@ -4617,6 +4617,10 @@
 
 
 # Minor moons of Uranus
+# Masses of Cordelia, Ophelia, Cressida from French et al. (2024), arXiv:2401.04634
+# "The Uranus System from Occultation Observations (1977-2006): Rings,
+# Pole Direction, Gravity Field, and Masses of Cressida, Cordelia, and Ophelia"
+# https://arxiv.org/abs/2401.04634
 
 "Cordelia:Uranus VI:S 1986 U 7" "Sol/Uranus"
 {
@@ -4624,6 +4628,8 @@
 	Mesh	"roughsphere.cms"
 	Texture	"asteroid.*"
 	SemiAxes	[ 25 18 18 ]
+	Mass	0.00000001018084
+	Density	1790
 	OrbitFrame
 	{
 		EclipticJ2000	{ Center "Sol/Uranus" }
@@ -4654,6 +4660,8 @@
 	Mesh	"roughsphere.cms"
 	Texture	"asteroid.*"
 	SemiAxes	[ 27 19 19 ]
+	Mass	0.000000005977897
+	Density	870
 	OrbitFrame
 	{
 		EclipticJ2000	{ Center "Sol/Uranus" }
@@ -4714,6 +4722,8 @@
 	Mesh	"roughsphere.cms"
 	Texture	"asteroid.*"
 	SemiAxes	[ 46 37 37 ]
+	Mass	0.000000030793704
+	Density	700
 	OrbitFrame
 	{
 		EclipticJ2000	{ Center "Sol/Uranus" }
@@ -4940,6 +4950,11 @@
 	InfoURL	"https://en.wikipedia.org/wiki/Perdita_(moon)"
 }
 
+# Mass from Jacobson (2023)
+# "Update of the Orbits of the Regular Uranian Satellites and the Gravitational Field of the Uranian System"
+# https://ui.adsabs.harvard.edu/abs/2023DPS....5522102J/abstract
+# via French et al. (2024), arXiv:2401.04634
+# https://arxiv.org/abs/2401.04634
 "Puck:Uranus XV:S 1985 U 1" "Sol/Uranus"
 {
 	Class	"minormoon"
@@ -4947,6 +4962,7 @@
 	Orientation	[ -90 0 1 0 ]
 	Texture	"puck.*"
 	Radius	83.5
+	Mass	0.0000003198259
 	OrbitFrame
 	{
 		EclipticJ2000	{ Center "Sol/Uranus" }
diff --git a/data/solarsys.ssc b/data/solarsys.ssc
index 3a22f297..79100ad2 100644
--- a/data/solarsys.ssc
+++ b/data/solarsys.ssc
@@ -275,7 +275,7 @@
 	#	MeridianAngle	38.3213
 	# }
 
-	LunarLambert	0.5
+	LunarLambert	1
 	GeomAlbedo	0.136
 	BondAlbedo	0.11
 	InfoURL	"https://en.wikipedia.org/wiki/Moon"
@@ -1167,6 +1167,11 @@ AltSurface "Limit of knowledge" "Sol/Saturn/Hyperion"
 	InfoURL	"https://en.wikipedia.org/wiki/Phoebe_(moon)"
 }
 
+# Masses from Jacobson (2023)
+# "Update of the Orbits of the Regular Uranian Satellites and the Gravitational Field of the Uranian System"
+# https://ui.adsabs.harvard.edu/abs/2023DPS....5522102J/abstract
+# via French et al. (2024), arXiv:2401.04634
+# https://arxiv.org/abs/2401.04634
 "Uranus" "Sol"
 {
 	Class	"planet"
@@ -1174,7 +1179,7 @@ AltSurface "Limit of knowledge" "Sol/Saturn/Hyperion"
 	Color	[ 0.86828 0.97 1.0 ]
 	Radius	25559
 	Oblateness	0.0229
-	Mass	14.54
+	Mass	14.53614488
 	Atmosphere
 	{
 		Height	500
@@ -1229,7 +1234,7 @@ AltSurface "Limit of knowledge" "Sol/Saturn/Hyperion"
 	# NormalMap	"miranda-normal.*"
 	Color	[ 0.98357 0.98913 1.0 ]
 	SemiAxes	[ 240 234.2 232.9 ]
-	Mass	0.0000107880
+	Mass	0.000010537508
 	CustomOrbit	"miranda"
 
 	# Overridden by CustomOrbit
@@ -1279,7 +1284,7 @@ AltSurface "Limit of knowledge" "Sol/Uranus/Miranda"
 	# NormalMap	"ariel-normal.*"
 	Color	[ 1.0 1.0 0.999 ]
 	SemiAxes	[ 581.1 577.9 577.7 ]
-	Mass	0.0002094889
+	Mass	0.000206480241
 	CustomOrbit	"ariel"
 
 	# Overridden by CustomOrbit
@@ -1330,7 +1335,7 @@ AltSurface "Limit of knowledge" "Sol/Uranus/Ariel"
 	# NormalMap	"umbriel-normal.*"
 	Color	[ 1.0 0.99769 0.99749 ]
 	Radius	584.7
-	Mass	0.0002135030
+	Mass	0.000215756865
 	CustomOrbit	"umbriel"
 
 	# Overridden by CustomOrbit
@@ -1381,7 +1386,7 @@ AltSurface "Limit of knowledge" "Sol/Uranus/Umbriel"
 	# NormalMap	"titania-normal.*"
 	Color	[ 1.0 0.98945 0.97393 ]
 	Radius	788.4
-	Mass	0.00056925778
+	Mass	0.000578533155
 	CustomOrbit	"titania"
 
 	# Overridden by CustomOrbit
@@ -1432,7 +1437,7 @@ AltSurface "Limit of knowledge" "Sol/Uranus/Titania"
 	# NormalMap	"oberon-normal.*"
 	Color	[ 1.0 0.98881 0.97178 ]
 	Radius	761.4
-	Mass	0.00051506665
+	Mass	0.000520830543
 	CustomOrbit	"oberon"
 
 	# Overridden by CustomOrbit