| Asteroid |
Date(UT) |
Miss Distance |
Velocity (km/s) |
Diameter (m) |
| 2025 QV5 |
2026-Sep-02 |
14.2 LD |
7.3 |
12 |
| 2026 RB |
2026-Sep-02 |
7.5 LD |
8.6 |
20 |
| 2026 RH1 |
2026-Sep-02 |
0.9 LD |
8.7 |
7 |
| 2026 RZ |
2026-Sep-03 |
0.5 LD |
11.2 |
4 |
| 2026 RE |
2026-Sep-03 |
11 LD |
7.3 |
39 |
| 2026 RE2 |
2026-Sep-03 |
1.2 LD |
24 |
10 |
| 2026 RC |
2026-Sep-03 |
0.8 LD |
6.2 |
6 |
| 2026 RM2 |
2026-Sep-05 |
1.6 LD |
11.3 |
8 |
| 2026 RF |
2026-Sep-05 |
10.2 LD |
8.7 |
39 |
| 2026 RG |
2026-Sep-05 |
1.3 LD |
12.4 |
11 |
| 2026 RU1 |
2026-Sep-05 |
17.1 LD |
15.2 |
22 |
| 2026 RN1 |
2026-Sep-06 |
4.8 LD |
9.7 |
13 |
| 2026 RA1 |
2026-Sep-06 |
2.1 LD |
8.1 |
10 |
| 2022 RK |
2026-Sep-06 |
13.7 LD |
8.6 |
24 |
| 2026 RD |
2026-Sep-06 |
2.7 LD |
5.9 |
7 |
| 2026 RE1 |
2026-Sep-07 |
10.5 LD |
12.1 |
26 |
| 2026 RO1 |
2026-Sep-07 |
3.5 LD |
22.8 |
17 |
| 2026 RR1 |
2026-Sep-08 |
1.4 LD |
13.6 |
10 |
| 2026 RT1 |
2026-Sep-08 |
18.9 LD |
7.5 |
28 |
| 2024 RV12 |
2026-Sep-09 |
5.6 LD |
12.1 |
22 |
| 2026 RY1 |
2026-Sep-09 |
1.5 LD |
4.1 |
2 |
| 2026 RV1 |
2026-Sep-10 |
1.8 LD |
7.6 |
9 |
| 2026 OH3 |
2026-Sep-11 |
12.4 LD |
20.2 |
190 |
| 2026 RJ |
2026-Sep-11 |
4.4 LD |
6.9 |
23 |
| 2026 RD1 |
2026-Sep-11 |
5.5 LD |
6.9 |
17 |
| 2025 RQ2 |
2026-Sep-11 |
17.5 LD |
12.1 |
17 |
| 2026 RG2 |
2026-Sep-13 |
2.1 LD |
5.4 |
16 |
| 2026 RF2 |
2026-Sep-13 |
9.2 LD |
10.3 |
10 |
| 2010 FX9 |
2026-Sep-14 |
9.4 LD |
11.1 |
55 |
| 2025 SC |
2026-Sep-14 |
19.2 LD |
1.9 |
3 |
| 2024 RP12 |
2026-Sep-15 |
18.5 LD |
6.6 |
51 |
| 2026 NT2 |
2026-Sep-17 |
16.1 LD |
12.5 |
314 |
| 2026 RP1 |
2026-Sep-20 |
20 LD |
17.1 |
37 |
| 2026 RZ1 |
2026-Sep-22 |
10.4 LD |
9.1 |
38 |
| 2026 RS |
2026-Sep-30 |
11.1 LD |
6 |
23 |
| 2018 SP2 |
2026-Sep-30 |
5 LD |
14.3 |
39 |
| 2024 SH7 |
2026-Oct-04 |
10.5 LD |
10.8 |
12 |
| 2024 TD16 |
2026-Oct-07 |
14.2 LD |
11.8 |
17 |
| 2015 TS238 |
2026-Oct-08 |
4.7 LD |
15.8 |
30 |
| 2019 SD8 |
2026-Oct-10 |
18.7 LD |
9.5 |
12 |
| 2022 UP6 |
2026-Oct-15 |
2.6 LD |
9 |
8 |
| 2000 SZ162 |
2026-Oct-16 |
19.9 LD |
5.7 |
12 |
| 2020 FN3 |
2026-Oct-20 |
12.4 LD |
5.8 |
45 |
| 2017 UX7 |
2026-Oct-22 |
17 LD |
10.3 |
27 |
| 2018 GS1 |
2026-Oct-28 |
11.1 LD |
9.3 |
108 |
| 2022 UV21 |
2026-Oct-29 |
14.8 LD |
9.6 |
13 |
| 2025 UK9 |
2026-Oct-31 |
0.8 LD |
7.8 |
4 |
| 524522 |
2026-Nov-02 |
15.7 LD |
8.7 |
277 |
| 2021 VC4 |
2026-Nov-03 |
6 LD |
11.2 |
15 |
| 2017 WJ2 |
2026-Nov-05 |
15.6 LD |
11.8 |
118 |
| 2016 VZ1 |
2026-Nov-05 |
20 LD |
13.5 |
21 |
Notes: LD means
"Lunar Distance." 1 LD = 384,401 km, the distance
between Earth and the Moon. 1 LD also equals 0.00256
AU.
| |
Cosmic Rays in the Atmosphere |
SPACE WEATHER BALLOON DATA: Almost once a week, Spaceweather.com and the students of Earth to Sky Calculus fly space weather balloons to the stratosphere over California. These balloons are equipped with sensors that detect secondary cosmic rays, a form of radiation from space that can penetrate all the way down to Earth's surface. Our monitoring program has been underway without interruption for 10 years, resulting in a unique dataset of in situ atmospheric measurements.
Latest results (Nov. 2024): Atmospheric radiation is sharply decreasing in 2024. Our latest measurements in November registered a 10-year low:
What's going on? Ironically, the radiation drop is caused by increasing solar activity. Solar Cycle 25 has roared to life faster than forecasters expected. The sun's strengthening and increasingly tangled magnetic field repels cosmic rays from deep space. In addition, solar coronal mass ejections (CMEs) sweep aside cosmic rays, causing sharp reductions called "Forbush Decreases." The two effects blend together to bring daily radiation levels down.
.Who cares? Cosmic rays are a surprisingly "down to Earth" form of space weather. They can alter the chemistry of the atmosphere, trigger lightning, and penetrate commercial airplanes. According to a study from the Harvard T.H. Chan school of public health, crews of aircraft have higher rates of cancer than the general population. The researchers listed cosmic rays, irregular sleep habits, and chemical contaminants as leading risk factors. A number of controversial studies (#1, #2, #3, #4) go even further, linking cosmic rays with cardiac arrhythmias and sudden cardiac death.
Technical notes: The radiation sensors onboard our helium balloons detect X-rays and gamma-rays in the energy range 10 keV to 20 MeV. These energies span the range of medical X-ray machines and airport security scanners.
Data points in the graph labeled "Stratospheric Radiation" correspond to the peak of the Regener-Pfotzer maximum, which lies about 67,000 feet above central California. When cosmic rays crash into Earth's atmosphere, they produce a spray of secondary particles that is most intense at the entrance to the stratosphere. Physicists Eric Regener and Georg Pfotzer discovered the maximum using balloons in the 1930s and it is what we are measuring today.
| |
The
official U.S. government space weather bureau |
| |
The
first place to look for information about sundogs,
pillars, rainbows and related phenomena. |
| |
Researchers
call it a "Hubble for the sun." SDO
is the most advanced solar observatory ever. |
| |
3D
views of the sun from NASA's Solar and Terrestrial
Relations Observatory |
| |
Realtime
and archival images of the Sun from SOHO. |
| |
information about sunspots based on the latest NOAA/USAF Active Region Summary |
| |
current counts of failed and deployed Starlink satellites from Jonathan's Space Page. See also, all satellite statistics. |
| |
Authoritative predictions of space junk and satellite re-entries |
| |
from
the NOAA Space Environment Center |
| |
fun to read, but should be taken with a grain of salt! Forecasts looking ahead more than a few days are often wrong. |
| |
from the NOAA Space Environment Center |
| |
the
underlying science of space weather |
 |
Got a chipped or cracked windshield that prevents you from seeing space weather events while driving? Get windshield replacement from SR Windows & Glass with free mobile auto glass service anywhere in the Phoenix area. |
| |
These links help Spaceweather.com stay online. Thank you to our supporters! |
|
|
| |
|
|
|
