I thought you all might be interested in this. I was looking for 898 yesterday because of the previous syncs with 492 (see below). This is a familiar pattern that I noticed as far back as the late 90s with 904 and 040. Most commonly, two numbers will sync at a certain number of days apart, eight days in this case, then the third sync will be one day off, sometimes one more and sometime one less. My software doesn't find these and looking for them by hand is a chore. However, it's worth noting that this one-two-off-by-one day pattern is pretty common and it's worth watching for folks who are looking at syncs like this, especially if you are tracking a particular sync (like I did with 904 and 040). Anyway, here is the chart that shows how this works:
07/16/15; Day: 372; Night: 492 | 01/17/15; Day: 258; Night: 492 | 09/29/09; Day: 492; Night: 564
07/17/15; Day: 288; Night: 051 | 01/18/15; Day: 635; Night: 863 | 09/30/09; Day: 418; Night: 764
07/18/15; Day: 487; Night: 147 | 01/19/15; Day: 998; Night: 119 | 10/01/09; Day: 781; Night: 587
07/19/15; Day: 397; Night: 712 | 01/20/15; Day: 139; Night: 576 | 10/02/09; Day: 618; Night: 842
07/20/15; Day: 289; Night: 233 | 01/21/15; Day: 140; Night: 894 | 10/03/09; Day: 730; Night: 566
07/21/15; Day: 363; Night: 253 | 01/22/15; Day: 511; Night: 300 | 10/04/09; Day: 670; Night: 550
07/22/15; Day: 071; Night: 655 | 01/23/15; Day: 563; Night: 736 | 10/05/09; Day: 796; Night: 339
07/23/15; Day: 688; Night: 515 | 01/24/15; Day: 383; Night: 397 | 10/06/09; Day: 029; Night: 782
07/24/15; Day: 529; Night: 159 | 01/25/15; Day: 993; Night: 898 | 10/07/09; Day: 898; Night: 891
07/25/15; Day: 898; Night: ??? <- off by one day