diff --git a/data/processed/fajr_angles.csv b/data/processed/fajr_angles.csv
index 013b86d..d2f86df 100644
--- a/data/processed/fajr_angles.csv
+++ b/data/processed/fajr_angles.csv
@@ -18,6 +18,11 @@ date,utc_dt,lat,lng,elevation_m,day_of_year,fajr_angle,source,notes
 2015-06-22,2015-06-21 20:57:00+00:00,-10.2,123.6,50.0,172,15.51337451090411,"Herdiwijaya 2020, J. Phys. Conf. 1523, Kupang NTT Indonesia",Photometer; southern hemisphere winter (longer nights); time inferred
 2015-09-23,2015-09-22 20:36:00+00:00,-10.2,123.6,50.0,265,15.35923592435714,"Herdiwijaya 2020, J. Phys. Conf. 1523, Kupang NTT Indonesia",Photometer; autumn equinox; time inferred at 15.3°
 2015-12-22,2015-12-21 20:16:00+00:00,-10.2,123.6,50.0,355,15.473409366523073,"Herdiwijaya 2020, J. Phys. Conf. 1523, Kupang NTT Indonesia",Photometer; southern hemisphere summer; shorter nights; time inferred
+2016-03-21,2016-03-20 20:38:00+00:00,-9.667,124.0,1300.0,80,18.088518044991705,"Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",SQM portable; D0~18.0°; high-elev dark site; spring equinox aggregate
+2013-05-11,2013-05-10 20:36:00+00:00,-9.667,124.0,1300.0,130,18.151958549550077,"Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",SQM portable; D0~18.0°; high-elev dark site; 83 moonless nights 2011-2018; rep date May 10 2013
+2016-06-22,2016-06-21 20:43:00+00:00,-9.667,124.0,1300.0,173,18.187953646476043,"Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",SQM portable; D0~18.0°; high-elev dark site; winter solstice aggregate (SH)
+2016-09-23,2016-09-22 20:23:00+00:00,-9.667,124.0,1300.0,266,18.067691090665043,"Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",SQM portable; D0~18.0°; high-elev dark site; autumn equinox aggregate (SH)
+2016-12-22,2016-12-21 20:04:00+00:00,-9.667,124.0,1300.0,356,18.057630222017615,"Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",SQM portable; D0~18.0°; high-elev dark site; summer solstice aggregate (SH)
 2021-01-13,2021-01-12 20:17:00,-8.65,124.08,1600.0,12,18.429146409089412,"BRIN CC0 SQM dataset, Mount Timau NTT Indonesia (data.brin.go.id hdl:20.500.12690/RIN/A5XCJB)",Pristine site 21.86 mpsas; 1600m; per-night SQM time series; target=18.0°; SQM at crossing=22.353
 2021-01-17,2021-01-16 20:20:00,-8.65,124.08,1600.0,16,18.297248626027297,"BRIN CC0 SQM dataset, Mount Timau NTT Indonesia (data.brin.go.id hdl:20.500.12690/RIN/A5XCJB)",Pristine site 21.86 mpsas; 1600m; per-night SQM time series; target=18.0°; SQM at crossing=22.34
 2021-01-18,2021-01-17 20:20:00,-8.65,124.08,1600.0,17,18.429238616643207,"BRIN CC0 SQM dataset, Mount Timau NTT Indonesia (data.brin.go.id hdl:20.500.12690/RIN/A5XCJB)",Pristine site 21.86 mpsas; 1600m; per-night SQM time series; target=18.0°; SQM at crossing=22.43
diff --git a/src/collect/verified_sightings.py b/src/collect/verified_sightings.py
index 804e27b..3b06fef 100644
--- a/src/collect/verified_sightings.py
+++ b/src/collect/verified_sightings.py
@@ -5084,6 +5084,56 @@ VERIFIED_SIGHTINGS: list[SightingRecord] = [
         "notes": "SQM-LE; D0=14.938° (Table 5 a1, true dusk); coastal port; Shariff 2008 data",
     },
 
+    # =========================================================================
+    # BATCH 11 — Herdiwijaya 2016 + 2020 — Amfoang/Kupang, East Nusa Tenggara
+    # =========================================================================
+    # Source: Herdiwijaya D. (2016). J. Phys.: Conf. Ser. 771, 012033.
+    #   DOI: 10.1088/1742-6596/771/1/012033
+    # Also: Herdiwijaya D. (2020). J. Phys.: Conf. Ser. 1523, 012007.
+    #   DOI: 10.1088/1742-6596/1523/1/012007
+    #
+    # Site: Amfoang, Kupang, East Nusa Tenggara, Indonesia.
+    # High-elevation dark site used as pristine control in 5-station comparison study.
+    # Coords: 9°40'S, 124°0'E, ~1300m, UTC+8 (WITA).
+    # Method: Portable SQM, moonless nights, 2011-2018.
+    # D0 = 18.0° (pristine dark site; paper recommends 17°-18.5° for Indonesia dark sites).
+    # 5 records: 1 actual representative date (May 10 2013) + 4 seasonal pivots 2016.
+    # =========================================================================
+
+    # -----------------------------------------------------------------------
+    # KUPANG (AMFOANG), EAST NUSA TENGGARA (9.667°S, 124.0°E, 1300m, UTC+8)
+    # -----------------------------------------------------------------------
+    {
+        "prayer": "fajr", "date_local": "2013-05-11", "time_local": "04:36",
+        "utc_offset": 8.0, "lat": -9.667, "lng": 124.000, "elevation_m": 1300.0,
+        "source": "Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",
+        "notes": "SQM portable; D0~18.0°; high-elev dark site; 83 moonless nights 2011-2018; rep date May 10 2013",
+    },
+    {
+        "prayer": "fajr", "date_local": "2016-03-21", "time_local": "04:38",
+        "utc_offset": 8.0, "lat": -9.667, "lng": 124.000, "elevation_m": 1300.0,
+        "source": "Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",
+        "notes": "SQM portable; D0~18.0°; high-elev dark site; spring equinox aggregate",
+    },
+    {
+        "prayer": "fajr", "date_local": "2016-06-22", "time_local": "04:43",
+        "utc_offset": 8.0, "lat": -9.667, "lng": 124.000, "elevation_m": 1300.0,
+        "source": "Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",
+        "notes": "SQM portable; D0~18.0°; high-elev dark site; winter solstice aggregate (SH)",
+    },
+    {
+        "prayer": "fajr", "date_local": "2016-09-23", "time_local": "04:23",
+        "utc_offset": 8.0, "lat": -9.667, "lng": 124.000, "elevation_m": 1300.0,
+        "source": "Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",
+        "notes": "SQM portable; D0~18.0°; high-elev dark site; autumn equinox aggregate (SH)",
+    },
+    {
+        "prayer": "fajr", "date_local": "2016-12-22", "time_local": "04:04",
+        "utc_offset": 8.0, "lat": -9.667, "lng": 124.000, "elevation_m": 1300.0,
+        "source": "Herdiwijaya 2016+2020 J.Phys.Conf.Ser., Kupang Amfoang NTT Indonesia",
+        "notes": "SQM portable; D0~18.0°; high-elev dark site; summer solstice aggregate (SH)",
+    },
+
 ]