Author: J. Schenker, Schweizerische Astronomische Gesellschaft (SAG) http://www.sag-sas.ch
Call for Observation during August 2021
1.) Minorplanets: Observable objects with apparent brightness < 10 mag
Asteroid Brightness Brightness Ephemeris
begin of month end of month
(1) Ceres 9.2 8.9 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=1
(2) Pallas 9.5 8.5 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2
(6) Hebe 8.5 9.1 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=6
(7) Iris 9.9 9.7 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=7
(12) Victoria 8.8 9.4 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=12
(43) Ariadne 9.9 9.9 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=43
(80) Sappho 9.9 9.9 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=80
(89) Julia 9.5 9.1 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=89
(349) Dembowska 9.9 10.1 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=349
2.) Minorplanets: Close encounters with astronomical objects
Date Time UT
[hh:mm]
Asteroid m (ast)
[mag]
Distance
[ ' ]
Polar angle
[]
Object m (obj)
[mag]
Position 2000
Ra

Dec
01.08.2021 01:00 (12) Victoria 8.8 10.0 168 HIP 100232 6.0 20h 19m 42s -01 05'
02.08.2021 00:00 (65) Cybele 11.5 1.5 345 HIP 94859 7.0 19h 18m 12s -18 52'
02.08.2021 23:00 (65) Cybele 11.5 4.5 359 43 Sgr 5.0 19h 17m 36s -18 57'
06.08.2021 01:00 (44) Nysa 11.8 4.0 299 HIP 19284 5.9 04h 08m 00s +17 20'
09.08.2021 02:00 (20) Massalia 11.3 5.0 80 4 Gem 6.9 06h 10m 30s +23 00'
11.08.2021 02:00 (89) Julia 9.3 5.0 154 HIP 109984 6.1 22h 16m 36s -01 36'
15.08.2021 21:00 (217) Eudora 11.7 6.0 153 HIP 107365 8.3 21h 44m 48s -06 21'
16.08.2021 22:00 (80) Sappho 9.9 4.5 199 HIP 104717 7.0 21h 12m 48s +02 39'
16.08.2021 23:40 (44) Nysa 11.7 0.5 173 δ Tau (Doublestar) 4.3 04h 25m 30s +17 56'
17.08.2021 02:10 (7) Iris 9.8 10.0 0 118 Tau (Doublestar) 5.5 05h 29m 18s +25 09'
20.08.2021 02:00 (25) Phocaea 11.3 6.0 203 NGC 672 10.8 01h 47m 54s +27 26'
22.08.2021 01:00 (44) Nysa 11.6 8.0 315 HIP 21251 6.3 04h 33m 30s +18 01'
24.08.2021 00:00 (1) Ceres 8.9 7.0 131 58 Tau 5.3 04h 20m 36s +15 06'
3.) Minorplanets: Close approaches by near-Earth objects with min. distance < 5 Lunar Distances LD
Date Time UT
[hh:mm]
Asteroid Min. distance
[LD]
rel. speed
[km/s]
Diameter
[m]
Ephemeris
14.08.2021 14:35 2016 BQ 4.33 4.70 12 - 26 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2016%20BQ
22.09.2021 14:43 2021 NY1 3.90 9.35 130 - 290 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2021%20NY1
09.11.2021 03:48 2019 XS 1.49 10.68 48 - 110 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2019%20XS
07.01.2022 17:32 2020 AP1 0.003 5.65 3.2 - 7.1 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2020%20AP1
18.02.2022 09:20 2018 CW2 2.23 10.76 18 - 41 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2018%20CW2
06.03.2022 09:17 2020 DC 3.12 4.94 12 - 27 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2020%20DC
19.03.2022 11:39 2016 FZ12 2.08 8.31 12 - 27 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2016%20FZ12
21.03.2022 16:38 2020 SQ 2.19 6.02 8.8 - 20 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2020%20SQ
29.04.2022 16:26 2017 UK52 1.17 13.72 15 - 33 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2017%20UK52
11.05.2022 03:56 2019 JE 4.77 7.22 15 - 34 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2019%20JE
15.05.2022 15:45 2012 UX68 2.28 8.20 40 - 90 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2012%20UX68
30.05.2022 03:59 2021 KO2 1.23 14.75 6.6 - 15 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2021%20KO2
4.) Minorplanets: Close approaches by near-Earth objects with apparent brightness < 14 mag
Date Time UT
[hh:mm]
Asteroid Min. distance
[LD]
rel. speed
[km/s]
Diameter
[m]
Ephemeris
06.08.2021 05:08 2018 LM4 31.85 16.39 460 - 1000 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2018%20LM4
21.08.2021 15:10 2016 AJ193 8.92 26.17 970 - 1780 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2016%20AJ193
13.09.2021 11:05 2021 MG1 22.02 17.26 590 - 1300 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2021%20MG1
15.09.2021 12:42 2001 EC 31.72 19.03 530 - 1200 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2001%20EC
23.09.2021 23:04 2003 QQ47 38.34 30.23 880 - 2000 https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=143649
5.) Comets:
Brightness
[mag]
Constellation Ephemeris
Short periodic comets:
4P/Faye 12.0 to 11.5 Taurus https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=4P%20[]
15P/Finlay 10.5 to 11.5 Taurus - Gemini https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=15P%20[]
67P/Tschurjumow-Gerasimenko 11.0 - 10.0 Pisces - Cetus - Aries https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=67P%20[]
Long or not periodic comets:
C/2017 K2 (PANSTARRS) 12.5 Hercules https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=C/2017%20K2
C/2019 L3 (ATLAS) 12.0 to 11.0 Auriga https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=C/2019%20L3
(Sources: CNEOS MPC JPL )