메타데이터
| 항목 |
값 |
| Designation |
C/2019 F1 (ATLAS-Africano) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-06-22T19:03:30.551040Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:29Z |
| Obs used |
1964 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
5.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-03-29T10:03:21.600000Z |
| Discovery magnitude (MPC) |
18.40 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-10-21.0000000 |
| e |
1.00348898 |
| q (au) |
3.595914 |
| a (au) |
-1030.647736 |
| i (deg) |
54.175708 |
| Ω (om, deg) |
38.726260 |
| ω (w, deg) |
251.113825 |
| M (ma, deg) |
-0.007292 |
밝기
산란 + 전체 선형
$$
M_a = (8.031 + 2.895\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.031 |
| n |
2.895 |
| gf |
0.914 |
| gb |
-0.906 |
| k |
1.000 |
| δ90 |
1.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2019-02-08 |
2019-10-14 |
+8.8747 |
-7.840 |
| 2019-10-14 |
2020-05-26 |
-6.5457 |
+4.593 |
| 2020-05-26 |
2021-06-18 |
-3.0290 |
+1.838 |
| 2021-06-27 |
2022-08-28 |
+0.5643 |
+0.081 |
| 2022-08-28 |
2022-12-25 |
-8.8752 |
+7.089 |
| 2022-12-25 |
2024-01-31 |
+9.9762 |
-7.455 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
02:51:50.13 |
+26:04:37.1 |
HIP 13433 |
15.45 |
| 2026-09-20 12:00 |
02:51:44.36 |
+26:04:50.1 |
HIP 13433 |
16.76 |
| 2026-09-21 00:00 |
02:51:38.52 |
+26:05:02.8 |
HIP 13433 |
18.09 |
| 2026-09-21 12:00 |
02:51:32.62 |
+26:05:15.1 |
HIP 13433 |
19.43 |
| 2026-09-22 00:00 |
02:51:26.66 |
+26:05:27.1 |
HIP 13433 |
20.79 |
| 2026-09-22 12:00 |
02:51:20.63 |
+26:05:38.6 |
HIP 13433 |
22.15 |
| 2026-09-23 00:00 |
02:51:14.55 |
+26:05:49.9 |
HIP 13433 |
23.53 |
| 2026-09-23 12:00 |
02:51:08.41 |
+26:06:00.7 |
HIP 13261 |
24.40 |
| 2026-09-24 00:00 |
02:51:02.21 |
+26:06:11.2 |
HIP 13261 |
23.87 |
| 2026-09-24 12:00 |
02:50:55.95 |
+26:06:21.3 |
HIP 13261 |
23.41 |
| 2026-09-25 00:00 |
02:50:49.63 |
+26:06:31.0 |
HIP 13261 |
23.04 |
| 2026-09-25 12:00 |
02:50:43.26 |
+26:06:40.4 |
HIP 13261 |
22.75 |
| 2026-09-26 00:00 |
02:50:36.82 |
+26:06:49.4 |
HIP 13261 |
22.56 |
| 2026-09-26 12:00 |
02:50:30.34 |
+26:06:58.0 |
HIP 13261 |
22.47 |
| 2026-09-27 00:00 |
02:50:23.79 |
+26:07:06.2 |
HIP 13261 |
22.48 |
| 2026-09-27 12:00 |
02:50:17.19 |
+26:07:14.1 |
HIP 13261 |
22.60 |
| 2026-09-28 00:00 |
02:50:10.54 |
+26:07:21.6 |
HIP 13261 |
22.82 |
| 2026-09-28 12:00 |
02:50:03.83 |
+26:07:28.8 |
HIP 13261 |
23.15 |
| 2026-09-29 00:00 |
02:49:57.06 |
+26:07:35.5 |
HIP 13261 |
23.58 |
| 2026-09-29 12:00 |
02:49:50.24 |
+26:07:41.9 |
HIP 13261 |
24.11 |
| 2026-09-30 00:00 |
02:49:43.37 |
+26:07:48.0 |
HIP 13261 |
24.73 |
| 2026-09-30 12:00 |
02:49:36.45 |
+26:07:53.6 |
HIP 13261 |
25.44 |
| 2026-10-01 00:00 |
02:49:29.48 |
+26:07:58.9 |
HIP 13261 |
26.24 |
| 2026-10-01 12:00 |
02:49:22.45 |
+26:08:03.9 |
HIP 13261 |
27.12 |
| 2026-10-02 00:00 |
02:49:15.37 |
+26:08:08.4 |
HIP 13015 |
27.49 |
| 2026-10-02 12:00 |
02:49:08.25 |
+26:08:12.6 |
HIP 13015 |
26.02 |
| 2026-10-03 00:00 |
02:49:01.07 |
+26:08:16.4 |
HIP 13015 |
24.55 |
| 2026-10-03 12:00 |
02:48:53.84 |
+26:08:19.9 |
HIP 13015 |
23.09 |
| 2026-10-04 00:00 |
02:48:46.57 |
+26:08:22.9 |
HIP 13015 |
21.64 |
| 2026-10-04 12:00 |
02:48:39.25 |
+26:08:25.7 |
HIP 13015 |
20.21 |
| 2026-10-05 00:00 |
02:48:31.88 |
+26:08:28.0 |
HIP 13015 |
18.80 |
| 2026-10-05 12:00 |
02:48:24.46 |
+26:08:30.0 |
HIP 13015 |
17.41 |
| 2026-10-06 00:00 |
02:48:17.00 |
+26:08:31.6 |
HIP 13015 |
16.07 |
| 2026-10-06 12:00 |
02:48:09.49 |
+26:08:32.8 |
HIP 13015 |
14.79 |
| 2026-10-07 00:00 |
02:48:01.94 |
+26:08:33.7 |
HIP 13015 |
13.59 |
| 2026-10-07 12:00 |
02:47:54.34 |
+26:08:34.2 |
HIP 13015 |
12.49 |
| 2026-10-08 00:00 |
02:47:46.70 |
+26:08:34.4 |
HIP 13015 |
11.52 |
| 2026-10-08 12:00 |
02:47:39.02 |
+26:08:34.2 |
HIP 13015 |
10.74 |
| 2026-10-09 00:00 |
02:47:31.30 |
+26:08:33.6 |
HIP 13015 |
10.18 |
| 2026-10-09 12:00 |
02:47:23.53 |
+26:08:32.6 |
HIP 13015 |
9.90 |
| 2026-10-10 00:00 |
02:47:15.73 |
+26:08:31.4 |
HIP 13015 |
9.91 |
| 2026-10-10 12:00 |
02:47:07.88 |
+26:08:29.7 |
HIP 13015 |
10.22 |
| 2026-10-11 00:00 |
02:47:00.00 |
+26:08:27.7 |
HIP 13015 |
10.81 |