메타데이터
| 항목 |
값 |
| Designation |
C/2024 C4 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-01-30T04:46:56.107200Z |
| Orbit solution date (soln_date, UTC) |
2024-08-18T18:42:14Z |
| Obs used |
545 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-02-14T01:57:11.318400Z |
| Discovery magnitude (MPC) |
17.45 o |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-04-20.0000000 |
| e |
0.98249391 |
| q (au) |
1.471267 |
| a (au) |
84.043133 |
| i (deg) |
79.287579 |
| Ω (om, deg) |
220.685068 |
| ω (w, deg) |
321.524084 |
| M (ma, deg) |
0.103363 |
밝기
산란 + 전체 선형
$$
M_a = (13.966 + 4.002\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.966 |
| n |
4.002 |
| gf |
1.000 |
| gb |
-0.751 |
| k |
0.989 |
| δ90 |
10.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
19:55:17.97 |
+64:25:03.5 |
HIP 97988 |
18.47 |
| 2026-06-01 12:00 |
19:55:01.79 |
+64:27:33.3 |
HIP 97988 |
15.77 |
| 2026-06-02 00:00 |
19:54:45.37 |
+64:30:01.7 |
HIP 97988 |
13.25 |
| 2026-06-02 12:00 |
19:54:28.72 |
+64:32:28.7 |
HIP 97988 |
11.02 |
| 2026-06-03 00:00 |
19:54:11.85 |
+64:34:54.3 |
HIP 97988 |
9.29 |
| 2026-06-03 12:00 |
19:53:54.75 |
+64:37:18.4 |
HIP 97988 |
8.36 |
| 2026-06-04 00:00 |
19:53:37.43 |
+64:39:41.1 |
HIP 97988 |
8.49 |
| 2026-06-04 12:00 |
19:53:19.88 |
+64:42:02.3 |
HIP 97988 |
9.64 |
| 2026-06-05 00:00 |
19:53:02.12 |
+64:44:22.0 |
HIP 97988 |
11.50 |
| 2026-06-05 12:00 |
19:52:44.13 |
+64:46:40.3 |
HIP 97988 |
13.79 |
| 2026-06-06 00:00 |
19:52:25.92 |
+64:48:57.1 |
HIP 97988 |
16.31 |
| 2026-06-06 12:00 |
19:52:07.50 |
+64:51:12.3 |
HIP 97988 |
18.98 |
| 2026-06-07 00:00 |
19:51:48.86 |
+64:53:26.0 |
HIP 97988 |
21.74 |
| 2026-06-07 12:00 |
19:51:30.01 |
+64:55:38.2 |
HIP 97988 |
24.55 |
| 2026-06-08 00:00 |
19:51:10.95 |
+64:57:48.8 |
HIP 97988 |
27.40 |
| 2026-06-08 12:00 |
19:50:51.67 |
+64:59:57.9 |
HIP 97364 |
28.77 |
| 2026-06-09 00:00 |
19:50:32.19 |
+65:02:05.3 |
HIP 97364 |
28.67 |
| 2026-06-09 12:00 |
19:50:12.50 |
+65:04:11.2 |
HIP 97364 |
28.85 |
| 2026-06-10 00:00 |
19:49:52.60 |
+65:06:15.5 |
HIP 97689 |
27.88 |
| 2026-06-10 12:00 |
19:49:32.50 |
+65:08:18.2 |
HIP 97689 |
26.69 |
| 2026-06-11 00:00 |
19:49:12.21 |
+65:10:19.3 |
HIP 97689 |
25.82 |
| 2026-06-11 12:00 |
19:48:51.71 |
+65:12:18.7 |
HIP 97689 |
25.28 |
| 2026-06-12 00:00 |
19:48:31.01 |
+65:14:16.4 |
HIP 97689 |
25.11 |
| 2026-06-12 12:00 |
19:48:10.13 |
+65:16:12.5 |
HIP 97689 |
25.31 |
| 2026-06-13 00:00 |
19:47:49.05 |
+65:18:06.9 |
HIP 97689 |
25.86 |
| 2026-06-13 12:00 |
19:47:27.78 |
+65:19:59.6 |
HIP 97689 |
26.75 |
| 2026-06-14 00:00 |
19:47:06.32 |
+65:21:50.7 |
HIP 97689 |
27.93 |
| 2026-06-14 12:00 |
19:46:44.68 |
+65:23:40.0 |
HIP 97689 |
29.38 |
| 2026-06-15 00:00 |
19:46:22.86 |
+65:25:27.6 |
HIP 97689 |
31.05 |
| 2026-06-15 12:00 |
19:46:00.86 |
+65:27:13.4 |
HIP 97689 |
32.91 |
| 2026-06-16 00:00 |
19:45:38.69 |
+65:28:57.5 |
HIP 97689 |
34.93 |
| 2026-06-16 12:00 |
19:45:16.34 |
+65:30:39.8 |
HIP 97514 |
35.95 |
| 2026-06-17 00:00 |
19:44:53.82 |
+65:32:20.4 |
HIP 97514 |
36.36 |
| 2026-06-17 12:00 |
19:44:31.13 |
+65:33:59.2 |
HIP 97514 |
37.03 |
| 2026-06-18 00:00 |
19:44:08.28 |
+65:35:36.2 |
HIP 97514 |
37.92 |
| 2026-06-18 12:00 |
19:43:45.27 |
+65:37:11.4 |
HIP 96544 |
37.81 |
| 2026-06-19 00:00 |
19:43:22.10 |
+65:38:44.8 |
HIP 96544 |
35.43 |
| 2026-06-19 12:00 |
19:42:58.78 |
+65:40:16.4 |
HIP 96544 |
33.11 |
| 2026-06-20 00:00 |
19:42:35.30 |
+65:41:46.2 |
HIP 96544 |
30.87 |
| 2026-06-20 12:00 |
19:42:11.68 |
+65:43:14.2 |
HIP 96544 |
28.72 |
| 2026-06-21 00:00 |
19:41:47.91 |
+65:44:40.3 |
HIP 96544 |
26.68 |
| 2026-06-21 12:00 |
19:41:23.99 |
+65:46:04.5 |
HIP 96544 |
24.77 |
| 2026-06-22 00:00 |
19:40:59.94 |
+65:47:27.0 |
HIP 96544 |
23.04 |