Close proximity air carrier-light transport unk-object while on approach to slc.

Attributes
ACN	91273
Time
Date	198807
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : slc
State Reference	UT
Altitude	msl bound lower : 9500 msl bound upper : 9500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : slc tower : stl
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 270 flight time total : 4100
ASRS Report	91273
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 280 flight time total : 8500
ASRS Report	91272
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200

Narrative:

On descent into slc on the localizer for runway 34L, 14 DME from slc VORTAC, I was the PF. Through approximately 9500' MSL I spotted something about 200' below heading south. I pulled our aircraft up and to the right and missed object. I couldn't tell if it was an aircraft or a balloon, but it was dark blue in color, and bigger than a basketball and smaller than an small aircraft. The captain advised ATC that we had a near miss and controller said he hadn't seen any traffic to report. Supplemental information from acn 91272: copilot and I simultaneously saw what appeared to be a drop military style tank or a missile. Object appeared to be 2-TONE blue, bullet shaped, with 1 winglet extending from each side. Callback conversation with reporter revealed the following: did not reveal any further insight about what the unk object was. The first officer did say that he thought it was a balloon, but could not be sure. The incident occurred over south slc airport, but reporter did not know of any activity at the airport that would be connected with their sighting.

Original NASA ASRS Text

Title: CLOSE PROX ACR-LTT UNK-OBJECT WHILE ON APCH TO SLC.

Narrative: ON DSCNT INTO SLC ON THE LOC FOR RWY 34L, 14 DME FROM SLC VORTAC, I WAS THE PF. THROUGH APPROX 9500' MSL I SPOTTED SOMETHING ABOUT 200' BELOW HDG S. I PULLED OUR ACFT UP AND TO THE RIGHT AND MISSED OBJECT. I COULDN'T TELL IF IT WAS AN ACFT OR A BALLOON, BUT IT WAS DARK BLUE IN COLOR, AND BIGGER THAN A BASKETBALL AND SMALLER THAN AN SMA. THE CAPT ADVISED ATC THAT WE HAD A NEAR MISS AND CTLR SAID HE HADN'T SEEN ANY TFC TO RPT. SUPPLEMENTAL INFO FROM ACN 91272: COPLT AND I SIMULTANEOUSLY SAW WHAT APPEARED TO BE A DROP MIL STYLE TANK OR A MISSILE. OBJECT APPEARED TO BE 2-TONE BLUE, BULLET SHAPED, WITH 1 WINGLET EXTENDING FROM EACH SIDE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: DID NOT REVEAL ANY FURTHER INSIGHT ABOUT WHAT THE UNK OBJECT WAS. THE F/O DID SAY THAT HE THOUGHT IT WAS A BALLOON, BUT COULD NOT BE SURE. THE INCIDENT OCCURRED OVER SOUTH SLC ARPT, BUT RPTR DID NOT KNOW OF ANY ACTIVITY AT THE ARPT THAT WOULD BE CONNECTED WITH THEIR SIGHTING.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.