C/2024 G3 (ATLAS)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/2024 G3 (ATLAS) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2025-01-13T10:11:01.593600Z |
| Orbit solution date (soln_date, UTC) | 2025-04-11T14:44:56Z |
| Obs used | 299 |
| NEO | - |
| M1 | 7.600 |
| K1 | 12.500 |
| PC | 0.030 |
| Discovery observation (MPC, UTC) | 2024-04-05T06:19:43.334400Z |
| Discovery magnitude (MPC) | 19.21 o |
| Discovery observatory (MPC) | W68 · ATLAS Chile, Rio Hurtado |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-06-19.0000000 |
| e | 1.00001229 |
| q (au) | 0.093493 |
| a (au) | -7606.453070 |
| i (deg) | 116.851095 |
| Ω (om, deg) | 220.332091 |
| ω (w, deg) | 108.125373 |
| M (ma, deg) | -0.000310 |
밝기
산란 + 전체 선형
$$ M_a = (8.416 + 4.557\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 8.416 |
| n | 4.557 |
| gf | 0.800 |
| gb | -0.507 |
| k | 0.800 |
| 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 |
|---|---|---|---|
| 2024-04-05 | 2025-01-03 | +1.9192 | -0.825 |
| 2025-01-03 | 2025-01-11 | -4.0729 | -3.425 |
| 2025-01-11 | 2025-01-13 | -1.4887 | -1.084 |
| 2025-01-13 | 2025-05-20 | -2.4746 | -2.595 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-02-03 00:00 | 22:52:34.71 | -69:28:50.7 | HIP 113176 | 26.15 |
| 2026-02-03 12:00 | 22:53:18.42 | -69:26:38.0 | HIP 113176 | 22.41 |
| 2026-02-04 00:00 | 22:54:02.13 | -69:24:26.4 | HIP 113176 | 18.99 |
| 2026-02-04 12:00 | 22:54:45.84 | -69:22:16.2 | HIP 113176 | 16.10 |
| 2026-02-05 00:00 | 22:55:29.53 | -69:20:07.2 | HIP 113176 | 14.05 |
| 2026-02-05 12:00 | 22:56:13.22 | -69:17:59.4 | HIP 113388 | 12.53 |
| 2026-02-06 00:00 | 22:56:56.91 | -69:15:52.9 | HIP 113388 | 12.20 |
| 2026-02-06 12:00 | 22:57:40.58 | -69:13:47.6 | HIP 113388 | 13.36 |
| 2026-02-07 00:00 | 22:58:24.25 | -69:11:43.6 | HIP 113388 | 15.68 |
| 2026-02-07 12:00 | 22:59:07.92 | -69:09:40.9 | HIP 113388 | 18.72 |
| 2026-02-08 00:00 | 22:59:51.57 | -69:07:39.4 | HIP 113870 | 20.54 |
| 2026-02-08 12:00 | 23:00:35.22 | -69:05:39.3 | HIP 113870 | 16.33 |
| 2026-02-09 00:00 | 23:01:18.86 | -69:03:40.3 | HIP 113870 | 12.24 |
| 2026-02-09 12:00 | 23:02:02.49 | -69:01:42.7 | HIP 113870 | 8.41 |
| 2026-02-10 00:00 | 23:02:46.12 | -68:59:46.4 | HIP 113870 | 5.44 |
| 2026-02-10 12:00 | 23:03:29.73 | -68:57:51.3 | HIP 113870 | 5.10 |
| 2026-02-11 00:00 | 23:04:13.34 | -68:55:57.5 | HIP 113969 | 7.59 |
| 2026-02-11 12:00 | 23:04:56.93 | -68:54:05.1 | HIP 113969 | 4.88 |
| 2026-02-12 00:00 | 23:05:40.52 | -68:52:13.9 | HIP 113969 | 5.30 |
| 2026-02-12 12:00 | 23:06:24.10 | -68:50:24.0 | HIP 113969 | 8.38 |
| 2026-02-13 00:00 | 23:07:07.67 | -68:48:35.4 | HIP 113969 | 12.26 |
| 2026-02-13 12:00 | 23:07:51.22 | -68:46:48.2 | HIP 114416 | 13.95 |
| 2026-02-14 00:00 | 23:08:34.77 | -68:45:02.3 | HIP 114416 | 10.95 |
| 2026-02-14 12:00 | 23:09:18.30 | -68:43:17.6 | HIP 114416 | 9.05 |
| 2026-02-15 00:00 | 23:10:01.83 | -68:41:34.3 | HIP 114416 | 8.97 |
| 2026-02-15 12:00 | 23:10:45.34 | -68:39:52.4 | HIP 114416 | 10.75 |
| 2026-02-16 00:00 | 23:11:28.83 | -68:38:11.7 | HIP 114416 | 13.67 |
| 2026-02-16 12:00 | 23:12:12.32 | -68:36:32.4 | HIP 114416 | 17.16 |
| 2026-02-17 00:00 | 23:12:55.79 | -68:34:54.5 | HIP 114861 | 17.26 |
| 2026-02-17 12:00 | 23:13:39.25 | -68:33:17.8 | HIP 114861 | 13.01 |
| 2026-02-18 00:00 | 23:14:22.69 | -68:31:42.6 | HIP 114861 | 8.80 |
| 2026-02-18 12:00 | 23:15:06.12 | -68:30:08.6 | HIP 114861 | 4.69 |
| 2026-02-19 00:00 | 23:15:49.54 | -68:28:36.1 | HIP 114861 | 1.74 |
| 2026-02-19 12:00 | 23:16:32.93 | -68:27:04.9 | HIP 114861 | 4.51 |
| 2026-02-20 00:00 | 23:17:16.32 | -68:25:35.0 | HIP 114861 | 8.59 |
| 2026-02-20 12:00 | 23:17:59.68 | -68:24:06.5 | HIP 114861 | 12.77 |
| 2026-02-21 00:00 | 23:18:43.03 | -68:22:39.4 | HIP 114861 | 16.98 |
| 2026-02-21 12:00 | 23:19:26.36 | -68:21:13.7 | HIP 115164 | 19.59 |
| 2026-02-22 00:00 | 23:20:09.67 | -68:19:49.3 | HIP 115164 | 21.13 |
| 2026-02-22 12:00 | 23:20:52.96 | -68:18:26.3 | HIP 115164 | 23.32 |
| 2026-02-23 00:00 | 23:21:36.24 | -68:17:04.7 | HIP 115164 | 25.98 |
| 2026-02-23 12:00 | 23:22:19.49 | -68:15:44.5 | HIP 115694 | 26.38 |
| 2026-02-24 00:00 | 23:23:02.72 | -68:14:25.6 | HIP 115694 | 22.29 |