메타데이터
| 항목 |
값 |
| Designation |
P/2023 M4 (ATLAS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-04-15T03:44:22.856640Z |
| Orbit solution date (soln_date, UTC) |
2024-10-11T15:13:32Z |
| Obs used |
1091 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
11.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-06-21T01:28:09.321600Z |
| Discovery magnitude (MPC) |
16.82 o |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-08-07.0000000 |
| e |
0.27942129 |
| q (au) |
3.929545 |
| a (au) |
5.453318 |
| i (deg) |
7.592560 |
| Ω (om, deg) |
296.296071 |
| ω (w, deg) |
320.696493 |
| M (ma, deg) |
37.060144 |
밝기
산란 + 전체 선형
$$
M_a = (5.149 + 5.443\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.149 |
| n |
5.443 |
| gf |
0.884 |
| gb |
-0.827 |
| k |
0.997 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
02:30:03.39 |
+21:41:23.6 |
HIP 11584 |
12.13 |
| 2026-06-01 12:00 |
02:30:23.30 |
+21:43:07.1 |
HIP 11584 |
17.04 |
| 2026-06-02 00:00 |
02:30:43.18 |
+21:44:50.5 |
HIP 11584 |
21.94 |
| 2026-06-02 12:00 |
02:31:03.01 |
+21:46:33.7 |
HIP 11728 |
19.31 |
| 2026-06-03 00:00 |
02:31:22.79 |
+21:48:16.7 |
HIP 11797 |
16.68 |
| 2026-06-03 12:00 |
02:31:42.52 |
+21:49:59.5 |
HIP 11797 |
12.48 |
| 2026-06-04 00:00 |
02:32:02.20 |
+21:51:42.2 |
HIP 11797 |
9.02 |
| 2026-06-04 12:00 |
02:32:21.84 |
+21:53:24.6 |
HIP 11797 |
7.37 |
| 2026-06-05 00:00 |
02:32:41.43 |
+21:55:06.9 |
HIP 11797 |
8.62 |
| 2026-06-05 12:00 |
02:33:00.97 |
+21:56:49.0 |
HIP 11797 |
11.89 |
| 2026-06-06 00:00 |
02:33:20.46 |
+21:58:30.9 |
HIP 11797 |
15.96 |
| 2026-06-06 12:00 |
02:33:39.89 |
+22:00:12.6 |
HIP 11797 |
20.35 |
| 2026-06-07 00:00 |
02:33:59.28 |
+22:01:54.1 |
HIP 11797 |
24.88 |
| 2026-06-07 12:00 |
02:34:18.61 |
+22:03:35.4 |
HIP 12017 |
26.24 |
| 2026-06-08 00:00 |
02:34:37.89 |
+22:05:16.5 |
HIP 12017 |
23.29 |
| 2026-06-08 12:00 |
02:34:57.12 |
+22:06:57.4 |
HIP 12017 |
21.03 |
| 2026-06-09 00:00 |
02:35:16.29 |
+22:08:38.1 |
HIP 12017 |
19.67 |
| 2026-06-09 12:00 |
02:35:35.40 |
+22:10:18.6 |
HIP 12017 |
19.41 |
| 2026-06-10 00:00 |
02:35:54.47 |
+22:11:58.9 |
HIP 12017 |
20.28 |
| 2026-06-10 12:00 |
02:36:13.47 |
+22:13:39.0 |
HIP 12017 |
22.12 |
| 2026-06-11 00:00 |
02:36:32.42 |
+22:15:18.8 |
HIP 12017 |
24.73 |
| 2026-06-11 12:00 |
02:36:51.31 |
+22:16:58.5 |
HIP 12278 |
24.10 |
| 2026-06-12 00:00 |
02:37:10.14 |
+22:18:37.9 |
HIP 12278 |
22.27 |
| 2026-06-12 12:00 |
02:37:28.91 |
+22:20:17.1 |
HIP 12278 |
21.32 |
| 2026-06-13 00:00 |
02:37:47.62 |
+22:21:56.0 |
HIP 12278 |
21.37 |
| 2026-06-13 12:00 |
02:38:06.27 |
+22:23:34.8 |
HIP 12278 |
22.39 |
| 2026-06-14 00:00 |
02:38:24.85 |
+22:25:13.3 |
HIP 12278 |
24.26 |
| 2026-06-14 12:00 |
02:38:43.38 |
+22:26:51.6 |
HIP 12278 |
26.79 |
| 2026-06-15 00:00 |
02:39:01.84 |
+22:28:29.6 |
HIP 12278 |
29.81 |
| 2026-06-15 12:00 |
02:39:20.24 |
+22:30:07.4 |
HIP 12278 |
33.17 |
| 2026-06-16 00:00 |
02:39:38.57 |
+22:31:45.0 |
HIP 12556 |
31.01 |
| 2026-06-16 12:00 |
02:39:56.83 |
+22:33:22.3 |
HIP 12556 |
28.62 |
| 2026-06-17 00:00 |
02:40:15.03 |
+22:34:59.3 |
HIP 12556 |
26.78 |
| 2026-06-17 12:00 |
02:40:33.16 |
+22:36:36.1 |
HIP 12556 |
25.63 |
| 2026-06-18 00:00 |
02:40:51.23 |
+22:38:12.7 |
HIP 12556 |
25.23 |
| 2026-06-18 12:00 |
02:41:09.22 |
+22:39:49.0 |
HIP 12556 |
25.62 |
| 2026-06-19 00:00 |
02:41:27.15 |
+22:41:25.0 |
HIP 12556 |
26.75 |
| 2026-06-19 12:00 |
02:41:45.00 |
+22:43:00.8 |
HIP 12665 |
24.45 |
| 2026-06-20 00:00 |
02:42:02.79 |
+22:44:36.4 |
HIP 12665 |
21.01 |
| 2026-06-20 12:00 |
02:42:20.50 |
+22:46:11.6 |
HIP 12665 |
18.01 |
| 2026-06-21 00:00 |
02:42:38.14 |
+22:47:46.6 |
HIP 12665 |
15.66 |
| 2026-06-21 12:00 |
02:42:55.71 |
+22:49:21.4 |
HIP 12665 |
14.30 |
| 2026-06-22 00:00 |
02:43:13.20 |
+22:50:55.8 |
HIP 12665 |
14.19 |