D/1960 S1 (van Houten) - Orbit 1
   Perihelion 2011 Feb 10.213611 TT
Epoch 2011 Feb  8.0 TT = JDT 2455600.5             Meyer
M 359.90736              (2000.0)            P               Q
n   0.04184973     Peri.   23.75350      0.95291428     -0.30283824     
a   8.2162612      Node   353.81221      0.24983792      0.81321801     
e   0.4546447      Incl.    8.32160      0.17185859      0.49695618     
P  23.55               q 4.4807814
From 6 observations 1960 Sep. 24-Oct. 26;   RMS error 0.381 arcseconds

600924 675  .11-  .27+    600928 675  .01+  .24+    601025 675( .96+  1.6-)
600926 675  .01+  .78-    601017 675  .10-  .11+    601026 675  .06+  .09- 
600927 675  .14+  .24+    601022 675( 1.1-  .42-)   

Station data:
(675) Palomar Mountain  (N33.3561 W116.8640).

D/1960 S1 (van Houten) - Orbit 2
   Perihelion 2012 Aug 9.395359 TT
Epoch 2012 Aug 21.0 TT = JDT 2456160.5             Meyer
M   0.61739              (2000.0)            P               Q
n   0.05320242     Peri.   37.54261      0.74906015     -0.66244724     
a   7.0013495      Node     3.97601      0.57417159      0.64272231     
e   0.3924163      Incl.    7.05514      0.33050849      0.38480082     
P  18.53               q 4.2539052
From 7 observations 1960 Sep. 24-Oct. 26;   RMS error 0.499 arcseconds

600924 675  .04-  .23+    600928 675  .05-  .26+    601025 675( 1.3+  1.5-)
600926 675  .00   .80-    601017 675  .29+  .37+    601026 675  .39+  .06- 
600927 675  .10+  .24+    601022 675  .69-  .24-    

Station data:
(675) Palomar Mountain  (N33.3561 W116.8640).