Night of the Backslash Sky Orbs

Photo date: February 11, 2017. Photographer: Mark Mahin.

I took the top left photo on an earlier day, and the three other photos on this night. All four orbs have a diagonal stripe resembling a backslash. I have photographed 11 other orbs with a diagonal slash in the other direction (as you can see by following a link given below).

There was no fog, mist, rain or precipitation on this night.  This pattern recurrence is one of only 14 that I have documented. Below is my updated table listing recurring patterns in mysterious orbs I have photographed  (most of the examples referred to below can be conveniently seen in this post).
 

Description	Occurrences	Comments	URL
Inverted Y	7	Rather like the lower case lambda character, part of the Greek alphabet	http://orbpro.blogspot.com/2016/11/the-seventh-photo-ive-taken-of.html
Umbilical cord ( AKA "cul-de-sac")	10	Resembles an umbilical cord with a curved loop. Is it a symbol of motherhood?	http://orbpro.blogspot.com/2016/11/the-10th-appearance-of-this-orb-motif.html
Curved stripe at top or bottom	8	May be on top or bottom of orb	http://orbpro.blogspot.com/2017/01/high-enigma-of-striped-orb.html http://orbpro.blogspot.com/2016/07/more-striped-orbs_18.html
Diagonal stripe	13	Goes from one side of orb to another, diagonally. Looks like a slash (not a backslash)	http://orbpro.blogspot.com/2017/01/another-sky-orb-with-diagonal-slash.html http://orbpro.blogspot.com/2016/12/striped-orb-and-bright-sky-orbs.html http://orbpro.blogspot.com/2017/01/striped-orb-shows-up-for-ghost.html
Short diagonal stripe	5	Goes from top right corner toward center	http://orbpro.blogspot.com/2016/11/the-5th-sky-orb-ive-photographed-with.html
Hose and circle	9	Looks like a ball that has fallen out of a tube	http://orbpro.blogspot.com/2017/02/the-9th-time-ive-photographed-this.html
Slanted C	11	Looks like a C shape, tilted over quite a bit to the right	http://orbpro.blogspot.com/2017/01/recurrence-of-slanted-c-pattern-in.html
Inverted V	3	Looks rather like the caret character (an inverted V)	http://orbpro.blogspot.com/2016/11/another-inverted-v-orb.html
Hook-like stripe	4	Has a kind of candy-cane shape	http://orbpro.blogspot.com/2016/07/another-orb-with-hook-like-stripe.html http://orbpro.blogspot.com/2016/11/strange-stripes-on-mysterious-orb.html  http://orbpro.blogspot.com/2016/07/blue-orbs-haunt-windows.html
Curvy 9 which fell down	2	Looks like a curvy nine which “fell down”	http://orbpro.blogspot.com/2016/07/two-striped-orbs-with-same-fingerprint.html
4 stripes	2	Straight lines intersecting in a particular shape	http://orbpro.blogspot.com/2016/07/the-same-strange-mark-on-two-striped.html
Broken squiggly T	3	One wiggly horizontal stripe at the top above a vertical stripe at the bottom	http://orbpro.blogspot.com/2016/07/reappearance-of-double-striped-orb.html
Hockey stick	2	A stripe with a shape resembling a hockey stick	http://orbpro.blogspot.com/2017/02/another-hockey-stick-sky-orb.html
Backslash	4	Goes from one side of orb to another, diagonally. Looks like a backslash (not a slash)	This post