<p>What bright satellite or other spacecraft did I see pass near the Tiangong space station on the morning of 2/15?</p>
<p>(I've ruled out the International Space Station, as that was in view a few minutes earlier.)</p>
<p>Location-- Wichita KS
Time-- around 6:32:30 Central Standard Time, +/- 30 seconds.  (That would be 12:32:30 GMT)
Date -- 2/15/2023</p>
<p>Location in sky where the object passed near the Tiangong space station-- my recollection is that it was close to Vindemiatrix, though it might have been closer to Auva/ Delta Virginis.  These are major stars in the constellation Virgo.</p>
<p>Rough coordinates of this portion of Virgo at this time are (from Stellarium Web):</p>
<p>Ra/Dec
13h 03m18.3s   +07°22'02.6&quot;
Az/Alt
240°36'25.8&quot;   +42°39'20.6&quot;</p>
<p>Description of path of unknown satellite-- trajectory was mostly south to north, with some east to west component.  It passed slightly <em>in front of</em> the Tiangong space station near the described location, and I was able to keep it in view till it was quite low in the NNW or N, about the same time that the Tiangong space station was nearing the eastern horizon.  No flashing or other marked changes in brightness were observed.</p>
<p>Apparent brightness-- about the same as the Tiangong space station.</p>
<p>All observations were naked-eye, as the dawn was starting to brighten the sky.</p>
<p>I've tried to answer this using Stellarium Web (<a href="https://stellarium-web.org/" rel="nofollow noreferrer">https://stellarium-web.org/</a>), but the only thing showing with a somewhat similar trajectory is Starlink 3162, and its apparent magnitude for that time is only showing as +3.89, while the Tiangong space station is showing a magnitude of -1.94 for that time, so that would seem to be ruled out.  Plus, that satellite's path passed just <em>behind</em> the Tiangong space station, but I'm pretty sure I'm recalling correctly when I say the unknown satellite passed just <em>ahead</em> of it.</p>
<p>A few follow-up questions--</p>
<ol>
<li><p>Statistically speaking, is a bright object not shown on Stellarium Web most likely to be a secret military satellite?  Or just a new satellite that hasn't yet been added to the site yet?  Or spacecraft or spacecraft component (discarded booster rocket etc) that is not actually a satellite in a long-term orbit?</p>
</li>
<li><p>If the object I saw can be identified, how close did it <em>actually</em> pass to the Tiangong space station?  What was the altitude of each object at the closest point of approach?  What was the horizontal distance between the two objects at the closest point of approach?</p>
</li>
</ol>

CC BY-SA 4.0
2023-02-15T14:55:10.257Z
Just found this, maybe it will help -- https://astronomy.stackexchange.com/a/12180/45027
quiet flyer
CC BY-SA 4.0
2023-02-15T15:06:36.470Z
Well, tried https://in-the-sky.org/satpasses.php?day=14&month=2&year=2023&mag=2&anysat=v0&group=1&s= set to show greater than magnitude 2, but it didn't even show the Tiangong space station!
quiet flyer
CC BY-SA 4.0
2023-02-15T16:22:52.403Z
Heavens-above.com does not show anything either. Unlikely to be Starlink (#1). It could be military (#2). Mike McCant's website http://www.mmccants.org/tles/index.html has elements of classified objects as determined by amateur astronomers. Some version of Stellarium (web-based or download) should be able to import these.
JohnHoltz
CC BY-SA 4.0
2023-02-15T16:42:50.823Z
@quietflyer are you absolutely sure that it was a different object entirely and not the station itself? If you are, it could be a cargo or crew vehicle.
Deko Revinio
CC BY-SA 4.0
2023-02-15T16:59:55.367Z
@DekoRevinio-leaningaway- -- yes, note the completely different directions in which the objects eventually approached the far horizons.  Their trajectories were completely different.  However, there was another instance some months ago where I saw an object that seemed to be possibly *exactly* following the trajectory of the Tiangong station.  I may post another question about that, if I can find my notes as to details.
quiet flyer
CC BY-SA 4.0
2023-02-15T17:16:59.263Z
@quietflyer ok. Just asking because there have been numerous times when people have asked me a similar question (in-person) and when I actually went and observed it myself it turned out to be the same satellite. It's just part of my mental process.
Deko Revinio
CC BY-SA 4.0
2023-02-15T17:40:05.777Z
Perhaps "amateur-astronomy" and "observational-astronomy" tags should be added; not familiar enough with this site to be sure--
quiet flyer
CC BY-SA 4.0
2023-02-15T17:41:28.597Z
PS another highlight of the sighting was watching the Tiangong come *very close to occulting* Arcturus-- had binocs up by then and did see some clearance at point of closed approach--
quiet flyer
CC BY-SA 4.0
2023-02-15T18:30:14.930Z
("closed"="closest")
quiet flyer
<artificial-satellite>
What bright satellite did I see pass near the Tiangong space station on the morning of 2/15?
quiet flyer
# What bright satellite did I see pass near the Tiangong space station on the morning of 2/15?

(Asked by: username_0 on 2023-02-15)

What bright satellite or other spacecraft did I see pass near the Tiangong space station on the morning of 2/15?

(I've ruled out the International Space Station, as that was in view a few minutes earlier.)

Location-- Wichita KS
Time-- around 6:32:30 Central Standard Time, +/- 30 seconds. (That would be 12:32:30 GMT)
Date -- 2/15/2023

Location in sky where the object passed near the Tiangong space station-- my recollection is that it was close to Vindemiatrix, though it might have been closer to Auva/ Delta Virginis. These are major stars in the constellation Virgo.

Rough coordinates of this portion of Virgo at this time are (from Stellarium Web):

Ra/Dec
13h 03m18.3s +07°22'02.6"
Az/Alt
240°36'25.8" +42°39'20.6"

Description of path of unknown satellite-- trajectory was mostly south to north, with some east to west component. It passed slightly *in front of* the Tiangong space station near the described location, and I was able to keep it in view till it was quite low in the NNW or N, about the same time that the Tiangong space station was nearing the eastern horizon. No flashing or other marked changes in brightness were observed.

Apparent brightness-- about the same as the Tiangong space station.

All observations were naked-eye, as the dawn was starting to brighten the sky.

I've tried to answer this using Stellarium Web (<https://stellarium-web.org/>), but the only thing showing with a somewhat similar trajectory is Starlink 3162, and its apparent magnitude for that time is only showing as +3.89, while the Tiangong space station is showing a magnitude of -1.94 for that time, so that would seem to be ruled out. Plus, that satellite's path passed just *behind* the Tiangong space station, but I'm pretty sure I'm recalling correctly when I say the unknown satellite passed just *ahead* of it.

A few follow-up questions--

1. Statistically speaking, is a bright object not shown on Stellarium Web most likely to be a secret military satellite? Or just a new satellite that hasn't yet been added to the site yet? Or spacecraft or spacecraft component (discarded booster rocket etc) that is not actually a satellite in a long-term orbit?
2. If the object I saw can be identified, how close did it *actually* pass to the Tiangong space station? What was the altitude of each object at the closest point of approach? What was the horizontal distance between the two objects at the closest point of approach?

**Tags:** artificial-satellite
> **Comments:**
> **username_0**: Just found this, maybe it will help -- https://astronomy.stackexchange.com/a/12180/45027  
> **username_0**: Well, tried https://in-the-sky.org/satpasses.php?day=14&month=2&year=2023&mag=2&anysat=v0&group=1&s= set to show greater than magnitude 2, but it didn't even show the Tiangong space station!  
> **username_1**: Heavens-above.com does not show anything either. Unlikely to be Starlink (#1). It could be military (#2). Mike McCant's website http://www.mmccants.org/tles/index.html has elements of classified objects as determined by amateur astronomers. Some version of Stellarium (web-based or download) should be able to import these.  
> **username_2**: @quietflyer are you absolutely sure that it was a different object entirely and not the station itself? If you are, it could be a cargo or crew vehicle.  
> **username_0**: @DekoRevinio-leaningaway- -- yes, note the completely different directions in which the objects eventually approached the far horizons.  Their trajectories were completely different.  However, there was another instance some months ago where I saw an object that seemed to be possibly *exactly* following the trajectory of the Tiangong station.  I may post another question about that, if I can find my notes as to details.  
> **username_2**: @quietflyer ok. Just asking because there have been numerous times when people have asked me a similar question (in-person) and when I actually went and observed it myself it turned out to be the same satellite. It's just part of my mental process.  
> **username_0**: Perhaps "amateur-astronomy" and "observational-astronomy" tags should be added; not familiar enough with this site to be sure--  
> **username_0**: PS another highlight of the sighting was watching the Tiangong come *very close to occulting* Arcturus-- had binocs up by then and did see some clearance at point of closed approach--  
> **username_0**: ("closed"="closest")  

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## 0 answers

