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Large asteroid 1994 PC1 to fly past Earth at 5.5 LD on January 18

asteroid-1994-pc1-flyby-earth

A large near-Earth asteroid designated 1994 PC1 will fly past Earth at a distance of 5.5 LD / 0.01325 AU (1.98 million km / 1.23 million miles) on January 18, 2022. This is the second-closest approach of this object to Earth since 1933.

1994 PC1 is an Apollo-class asteroid (PHA) with an estimated diameter of 1 km ± 0.303 km (0.62 miles ± 0.18 mi).

It was discovered at Siding Spring Observatory in Coonabarabran, Australia on August 9, 1994, by Robert McNaught.

The object will fly past us at a speed (relative to the Earth) of 19.56 km/s at 21:51 UTC.

The closest flyby of this object took place on January 17, 1933, at a nominal distance of 0.00752 AU (1.1 million km / 700 000 miles).

While its next flyby will take place on July 3, 2022, at 0.44349 AU (66 million km), 1994 PC1 will not approach Earth as close as it will tomorrow until 12:28 UTC on January 18, 2105, at a distance of 0.01556 AU (2 328 075 km), and 23:50 UTC on January 20, 2194, at 0.02830 AU (4 233 281 km).

Close approach time (TDB) Body Nominal distance (AU)
1900-Feb-02 07:33 ± 00:03 Earth 0.32974
1900-Jun-25 23:53 ± < 00:01 Earth 0.4337
1911-Jan-27 17:17 ± 00:02 Earth 0.20112
1911-Jun-28 21:58 ± < 00:01 Earth 0.42482
1922-Jan-21 21:41 ± 00:01 Earth 0.08288
1922-Jul-01 03:48 ± < 00:01 Earth 0.43429
1933-Jan-17 10:32 ± < 00:01 Moon 0.00542
1933-Jan-17 11:45 ± < 00:01 Earth 0.00752
1933-Jul-03 12:15 ± < 00:01 Earth 0.44647
1943-Dec-29 08:18 ± < 00:01 Earth 0.44428
1947-Feb-02 23:23 ± < 00:01 Earth 0.32595
1947-Jun-27 10:32 ± < 00:01 Earth 0.4267
1958-Jan-13 01:42 ± < 00:01 Earth 0.11107
1958-Jul-06 12:33 ± < 00:01 Earth 0.47226
1972-Jan-27 23:28 ± < 00:01 Earth 0.19857
1972-Jun-28 22:31 ± < 00:01 Earth 0.41866
1983-Jan-07 00:04 ± < 00:01 Earth 0.2515
1986-Jun-25 20:40 ± < 00:01 Earth 0.47414
1997-Jan-20 23:58 ± < 00:01 Earth 0.06512
1997-Jul-02 02:20 ± < 00:01 Earth 0.43179
2008-Jan-02 19:50 ± < 00:01 Earth 0.34989
2011-Feb-08 16:47 ± < 00:01 Earth 0.42998
2011-Jun-26 14:31 ± < 00:01 Earth 0.44455
2022-Jan-18 21:51 ± < 00:01 Earth 0.01325
2022-Jul-03 09:51 ± < 00:01 Earth 0.44349
2033-Jan-08 08:58 ± < 00:01 Earth 0.21222
2043-Dec-29 12:33 ± < 00:01 Earth 0.44494
2047-Feb-06 08:51 ± < 00:01 Earth 0.38429
2047-Jun-26 21:30 ± < 00:01 Earth 0.43424
2058-Jan-25 08:48 ± < 00:01 Earth 0.14977
2058-Jun-30 12:00 ± < 00:01 Earth 0.42169
2069-Jan-14 22:21 ± < 00:01 Earth 0.07015
2069-Jul-05 11:37 ± < 00:01 Earth 0.46328
2080-Jan-03 23:25 ± < 00:01 Earth 0.32722
2083-Feb-12 20:59 ± < 00:01 Earth 0.49637
2083-Jun-26 07:12 ± < 00:01 Earth 0.4634
2094-Jan-29 16:18 ± < 00:01 Earth 0.23688
2094-Jun-29 00:57 ± < 00:01 Earth 0.41624
2105-Jan-18 12:28 ± < 00:01 Earth 0.01556
2105-Jul-05 12:38 ± < 00:01 Earth 0.44723
2115-Dec-31 04:41 ± 00:04 Earth 0.43313
2119-Feb-05 06:49 ± 00:05 Earth 0.34327
2119-Jun-28 23:32 ± 00:01 Earth 0.42103
2130-Jan-16 01:44 ± 00:09 Earth 0.07565
2130-Jul-07 09:28 ± 00:05 Earth 0.46253
2144-Jan-31 16:40 ± 00:09 Earth 0.24624
2144-Jun-29 20:24 ± 00:03 Earth 0.41214
2155-Jan-10 19:23 ± 00:07 Earth 0.19792
2158-Jun-27 15:08 ± < 00:01 Earth 0.48572
2169-Jan-25 01:00 ± 00:05 Earth 0.1218
2169-Jul-02 14:38 ± 00:02 Earth 0.41961
2180-Jan-06 00:55 ± 00:03 Earth 0.30912
2183-Feb-12 06:07 ± 00:03 Earth 0.4647
2183-Jun-28 04:03 ± < 00:01 Earth 0.44449
2194-Jan-20 23:50 ± < 00:01 Earth 0.0283
2194-Jul-05 00:04 ± < 00:01 Earth 0.4371

 

References:

Asteroid 1994 PC1 at Minor Planet Center; at CNEOS

Featured image credit: NASA/Eyes on asteroids

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