diff --git a/neoexchange/core/management/commands/lightcurve_extraction.py b/neoexchange/core/management/commands/lightcurve_extraction.py
index 2e6e1e139..8bd7994d6 100644
--- a/neoexchange/core/management/commands/lightcurve_extraction.py
+++ b/neoexchange/core/management/commands/lightcurve_extraction.py
@@ -204,8 +204,8 @@ def output_alcdef(self, lightcurve_file, block, site, dates, mags, mag_errors, f
         lightcurve_file.write('ENDMETADATA\n')
         i = 0
         for date in dates:
-            jd = datetime2mjd_utc(date)+0.5
-            lightcurve_file.write('DATA=24{:.6f}|{:+.3f}|{:+.3f}\n'.format(jd, mags[i], mag_errors[i]))
+            jd = datetime2mjd_utc(date)+2400000.5
+            lightcurve_file.write('DATA={:.6f}|{:+.3f}|{:+.3f}\n'.format(jd, mags[i], mag_errors[i]))
             i += 1
         lightcurve_file.write('ENDDATA\n')