NEO 231937 (2001 FO32) March 20-22

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NEO 231937 (2001 FO32) March 20-22

#1

Post by OzEclipse »


NEO Asteroid 231937 (2001 FO32) is coming.

It will pass approx 5 lunar distances from Earth March 21 and be visible in larger scopes for a couple of nights.
https://earthsky.org/astronomy-essentia ... earth-2021

Using Starry Night, I have plotted its path during the Australian Night times of March 20-21 and March 21-22.

On March 20/21, it moves on average at 1 degree per hour (twice the speed of the Moon against fixed stars) between 11pm and 5am local time.
It reaches a maximum brightness of mag 11.6.
2001 FO32-March20-21.jpg



On March 21/22, it doesn't rise until about 2am on March 22.
From 2am to dawn, it moves on average at 2.5 degree per hour (five times the speed of the Moon against fixed stars) but much fainter with the magnitude fading from 12.6-14 over 4 hrs.
2001 FO32-Mar 21-22.jpg
You can generate a custom ephemeris for your own location using the NASA Horizons or MPEPH web applications or enter the Besselian Elements below into your favourite planetarium application.

JPL/HORIZONS 231937 (2001 FO32) 2021-Feb-21 16:07:48
Rec #: 231937 (+COV) Soln.date: 2021-Feb-17_05:22:44 # obs: 187 (2001-2021)

IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):

EPOCH= 2454058.5 ! 2006-Nov-19.00 (TDB) Residual RMS= .56869
EC= .8264316552791315 QR= .2952567402259695 TP= 2453664.5151603082
OM= 181.9645372140942 W= 123.145712149813 IN= 38.89275151030026
A= 1.701097862636183 MA= 175.0207885825067 ADIST= 3.106938985046396
PER= 2.21872 N= .44423228 ANGMOM= .012632318
DAN= .98383 DDN= .37143 L= 311.9619055
B= 31.7153909 MOID= .00625346 TP= 2005-Oct-21.0151603082

Asteroid physical parameters (km, seconds, rotational period in hours):
GM= n.a. RAD= n.a. ROTPER= n.a.
H= 17.7 G= .150 B-V= n.a.
ALBEDO= n.a. STYP= n.a.

ASTEROID comments:
1: soln ref.= JPL#55, PHA OCC=0
2: source=ORB
Image
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Re: NEO 231937 (2001 FO32) March 20-22

#2

Post by messier 111 »


thx .
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Re: NEO 231937 (2001 FO32) March 20-22

#3

Post by kt4hx »


Thanks Joe, that is a really nice area of sky to be looking at anyway, so that just gives another dynamic. I will give it a shot from our dark site at the appropriate time if weather permits.
Alan

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Re: NEO 231937 (2001 FO32) March 20-22

#4

Post by kt4hx »


Here is a locator chart using Stellarium from my dark site in the western part of Virginia for the pre-dawn hours of 20 March. That seems to be the best time for me. It will just be inside Lupus from Centaurus, about 7' NNW of mag 7.4 HIP 73653 and about 8.5° above the southern horizon. Going to be a challenge for sure. If weather permits will use the 12 inch dob as its easier to work the horizon than with the 17.5.

2001 FO32.jpg
Alan

Scopes: Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob ||
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Mounts: ES Twilight-II and Twilight-I
EPs: AT 82° 28mm UWA || TV Ethos 100° 21mm and 13mm || Vixen LVW 65° 22mm ||
ES 82° 18mm || Pentax XW 70° 10mm, 7mm and 5mm || barlows
Filters (2 inch): DGM NPB || Orion Ultra Block, O-III and Sky Glow || Baader HaB
Primary Field Atlases: Uranometria All-Sky Edition and Interstellarum Deep Sky Atlas
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"Astronomers, we look into the past to see our future." (me)
"Seeing is in some respect an art, which must be learnt." (William Herschel)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"No good deed goes unpunished." (various)
Some people without brains do an awful lot of talking, don't you think?” (Scarecrow, The Wonderful Wizard of Oz)
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Re: NEO 231937 (2001 FO32) March 20-22

#5

Post by OzEclipse »


Thanks Alan. Still trying to notch up one of these events.

Post #2 in this thread was supposed to be posted as a pointer in the Astronomy Reports sub forum. Guess I was a bit tired :lol:

While there are many NEO passes, the few times that I've had an advance warning of a perigee passage have been foiled by cloud/work or other issues. The first time i tried was for the very close passage of 2012 DA14 in February 2013. Very small object that had a very close passage to Earth. It was going to brighten from undetectable to 7th(?) mag and shoot across 20 degrees of sky. I did a lot of work for the region preparing finder charts and posting them on Ice in Space.

Planetarium programs esp Starry Night didn't work very well for an object so close to Earth. I checked the Starry Night sky path against Horizons and MPEph generated ephemerides and there was a 20 degree offset.

Weather forecast said that I should drive 100km NW of Canberra but when I woke at midnight, the sky was clear in Canberra. So I thought I'd save the 2 hrs round trip drive and instead I drove to an observing spot on the edge of the city, set up the scope. Just as it was brightening to within reach of my scope, the cloud rolled in. As I looked out to the north west I could see it was clear. :cry:

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Re: NEO 231937 (2001 FO32) March 20-22

#6

Post by AstroBee »


That might be a tough target for me as it will only be 12° above the southern horizon as it crosses the meridian but I've managed to image (rather poorly) NGC 5139 when it was only 6° above the horizon so it's definitely on my list to attempt it, weather permitting.
I remember back in 2017 when NEO 2014 JO25 passed by our club made a big deal out of it. We had the media out covering it and everything. I was able to give the local weather guy, who happens to be an amateur astronomer, a feed from my laptop as I imaged it passing M64 the Blackeye Galaxy. Here's a timelapse I was able to create from that pass.

https://youtu.be/QQDdkO4iZMw

Maybe I'll be able to do the same with this one. Too bad it's not passing by Omega Centauri or Centaurus A.
Greg M.~ "Ad Astra per Aspera"
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Re: NEO 231937 (2001 FO32) March 20-22

#7

Post by Dragonsfire »


Does not show up in my Skysafari6 unfortunately even after data update.
Neil
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Re: NEO 231937 (2001 FO32) March 20-22

#8

Post by OzEclipse »


Dragonsfire wrote: Sat Mar 20, 2021 3:57 pm Does not show up in my Skysafari6 unfortunately even after data update.
We are in the middle of a 1 in 50 year rain event here. Not much rain where I am but plenty of cloud. So unlikely to see anything.

Go to the NASA Horizons Web interface.
https://ssd.jpl.nasa.gov/horizons.cgi#top

Look up the body number 231937 in the "Target" field not the discover designation 2001 FO32


Enter your location and date range then you can generate an ephemeris from that.

Joe
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Amateur astronomer since 1978...................Web site : http://joe-cali.com/
Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80.
Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
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Re: NEO 231937 (2001 FO32) March 20-22

#9

Post by Dragonsfire »


Thanks!
Neil
Orion XT8i Dob, ES AR102
9x50 RACI Finder, TELRAD Reflex Sight, Electro Dot Sight RD400X
Agena SWA 38mm 70 FOV 2" EP, Orion 25+10mm Sirius Plossl 52 FOV EP
ES 82* 11mm, 18mm 2", ES 68* 24mm, 6mm, 25mm Ortho. EP, Televue 3X Barlow,CS lens 2.8mm-12mm F1.4
Filters Baader Continuum, UV/IF cut, Lumicon UHC, DGM OIII. ND5/3.8 Kendrick
GX1 Lumix, E-PM2, ASI224mc, SteadyPix Deluxe, iOptron SkyTracker 7.7lb
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