메타데이터
| 항목 |
값 |
| Designation |
C/2024 A2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-04-28T21:48:07.764480Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:12:46Z |
| Obs used |
497 |
| NEO |
- |
| M1 |
14.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-01-15T08:03:10.915200Z |
| Discovery magnitude (MPC) |
18.04 o |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-07-05.0000000 |
| e |
0.94184736 |
| q (au) |
1.881640 |
| a (au) |
32.356907 |
| i (deg) |
119.111392 |
| Ω (om, deg) |
78.167124 |
| ω (w, deg) |
295.581197 |
| M (ma, deg) |
0.359271 |
밝기
산란 + 전체 선형
$$
M_a = (13.792 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.792 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.726 |
| k |
0.995 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
00:52:36.18 |
+51:54:13.3 |
HIP 4161 |
5.27 |
| 2026-03-26 12:00 |
00:52:52.63 |
+51:55:07.4 |
HIP 4161 |
3.45 |
| 2026-03-27 00:00 |
00:53:09.10 |
+51:56:02.7 |
HIP 4161 |
3.27 |
| 2026-03-27 12:00 |
00:53:25.57 |
+51:56:59.4 |
HIP 4161 |
4.93 |
| 2026-03-28 00:00 |
00:53:42.06 |
+51:57:57.3 |
HIP 4161 |
7.27 |
| 2026-03-28 12:00 |
00:53:58.55 |
+51:58:56.4 |
HIP 4161 |
9.82 |
| 2026-03-29 00:00 |
00:54:15.04 |
+51:59:56.8 |
HIP 4161 |
12.45 |
| 2026-03-29 12:00 |
00:54:31.55 |
+52:00:58.5 |
HIP 4161 |
15.13 |
| 2026-03-30 00:00 |
00:54:48.05 |
+52:02:01.3 |
HIP 4161 |
17.84 |
| 2026-03-30 12:00 |
00:55:04.57 |
+52:03:05.5 |
HIP 4161 |
20.57 |
| 2026-03-31 00:00 |
00:55:21.08 |
+52:04:10.8 |
HIP 4477 |
20.93 |
| 2026-03-31 12:00 |
00:55:37.60 |
+52:05:17.4 |
HIP 4477 |
18.18 |
| 2026-04-01 00:00 |
00:55:54.12 |
+52:06:25.1 |
HIP 4477 |
15.42 |
| 2026-04-01 12:00 |
00:56:10.63 |
+52:07:34.1 |
HIP 4477 |
12.66 |
| 2026-04-02 00:00 |
00:56:27.15 |
+52:08:44.3 |
HIP 4477 |
9.91 |
| 2026-04-02 12:00 |
00:56:43.67 |
+52:09:55.6 |
HIP 4477 |
7.16 |
| 2026-04-03 00:00 |
00:57:00.18 |
+52:11:08.2 |
HIP 4477 |
4.48 |
| 2026-04-03 12:00 |
00:57:16.69 |
+52:12:21.9 |
HIP 4477 |
2.10 |
| 2026-04-04 00:00 |
00:57:33.20 |
+52:13:36.8 |
HIP 4477 |
2.14 |
| 2026-04-04 12:00 |
00:57:49.70 |
+52:14:52.9 |
HIP 4477 |
4.54 |
| 2026-04-05 00:00 |
00:58:06.20 |
+52:16:10.2 |
HIP 4477 |
7.26 |
| 2026-04-05 12:00 |
00:58:22.69 |
+52:17:28.6 |
HIP 4477 |
10.04 |
| 2026-04-06 00:00 |
00:58:39.17 |
+52:18:48.1 |
HIP 4523 |
12.51 |
| 2026-04-06 12:00 |
00:58:55.64 |
+52:20:08.8 |
HIP 4600 |
11.03 |
| 2026-04-07 00:00 |
00:59:12.10 |
+52:21:30.7 |
HIP 4600 |
9.91 |
| 2026-04-07 12:00 |
00:59:28.56 |
+52:22:53.7 |
HIP 4600 |
9.54 |
| 2026-04-08 00:00 |
00:59:45.00 |
+52:24:17.8 |
HIP 4600 |
9.99 |
| 2026-04-08 12:00 |
01:00:01.43 |
+52:25:43.1 |
HIP 4600 |
11.17 |
| 2026-04-09 00:00 |
01:00:17.85 |
+52:27:09.5 |
HIP 4600 |
12.89 |
| 2026-04-09 12:00 |
01:00:34.25 |
+52:28:37.0 |
HIP 4600 |
14.96 |
| 2026-04-10 00:00 |
01:00:50.64 |
+52:30:05.6 |
HIP 4600 |
17.26 |
| 2026-04-10 12:00 |
01:01:07.01 |
+52:31:35.3 |
HIP 4600 |
19.72 |
| 2026-04-11 00:00 |
01:01:23.37 |
+52:33:06.2 |
HIP 4875 |
21.35 |
| 2026-04-11 12:00 |
01:01:39.70 |
+52:34:38.1 |
HIP 4875 |
18.76 |
| 2026-04-12 00:00 |
01:01:56.02 |
+52:36:11.1 |
HIP 4875 |
16.27 |
| 2026-04-12 12:00 |
01:02:12.32 |
+52:37:45.2 |
HIP 4875 |
13.93 |
| 2026-04-13 00:00 |
01:02:28.60 |
+52:39:20.4 |
HIP 4875 |
11.84 |
| 2026-04-13 12:00 |
01:02:44.86 |
+52:40:56.6 |
HIP 4875 |
10.14 |
| 2026-04-14 00:00 |
01:03:01.09 |
+52:42:34.0 |
HIP 4875 |
9.09 |
| 2026-04-14 12:00 |
01:03:17.30 |
+52:44:12.4 |
HIP 4875 |
8.90 |
| 2026-04-15 00:00 |
01:03:33.49 |
+52:45:51.8 |
HIP 4992 |
7.31 |
| 2026-04-15 12:00 |
01:03:49.65 |
+52:47:32.3 |
HIP 4992 |
4.72 |
| 2026-04-16 00:00 |
01:04:05.78 |
+52:49:13.9 |
HIP 4992 |
2.91 |