C/2025 K1 (ATLAS)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/2025 K1 (ATLAS) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2025-10-08T10:33:17.674560Z |
| Orbit solution date (soln_date, UTC) | 2026-07-28T14:17:42Z |
| Obs used | 2410 |
| NEO | - |
| M1 | 14.200 |
| K1 | 4.500 |
| PC | - |
| Discovery observation (MPC, UTC) | 2025-05-24T08:29:05.942400Z |
| Discovery magnitude (MPC) | 18.66 c |
| Discovery observatory (MPC) | W68 · ATLAS Chile, Rio Hurtado |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2025-09-23.0000000 |
| e | 1.00025724 |
| q (au) | 0.334212 |
| a (au) | -1299.233883 |
| i (deg) | 147.864796 |
| Ω (om, deg) | 97.556975 |
| ω (w, deg) | 271.023897 |
| M (ma, deg) | -0.000325 |
밝기
산란 + 전체 선형
$$ M_a = (13.136 + 4.041\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 13.136 |
| n | 4.041 |
| gf | 1.000 |
| gb | -1.000 |
| k | 0.929 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) | 끝 (UTC) | a | b |
|---|---|---|---|
| 2025-04-08 | 2025-07-11 | +2.3077 | -1.022 |
| 2025-07-11 | 2025-09-05 | -1.3041 | +0.312 |
| 2025-09-05 | 2025-09-25 | +3.9477 | +0.374 |
| 2025-10-18 | 2025-11-19 | +0.3698 | -1.067 |
| 2025-11-19 | 2025-12-04 | -0.9694 | -0.624 |
| 2025-12-04 | 2026-01-22 | +7.1345 | -1.242 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 03:01:16.87 | +44:16:06.4 | HIP 13903 | 31.00 |
| 2026-07-29 12:00 | 03:01:12.77 | +44:19:07.6 | HIP 13903 | 32.36 |
| 2026-07-30 00:00 | 03:01:08.38 | +44:22:08.5 | HIP 13903 | 33.91 |
| 2026-07-30 12:00 | 03:01:03.72 | +44:25:09.2 | HIP 13903 | 35.64 |
| 2026-07-31 00:00 | 03:00:58.77 | +44:28:09.4 | HIP 13804 | 34.54 |
| 2026-07-31 12:00 | 03:00:53.54 | +44:31:09.4 | HIP 13804 | 33.43 |
| 2026-08-01 00:00 | 03:00:48.02 | +44:34:08.9 | HIP 13804 | 32.55 |
| 2026-08-01 12:00 | 03:00:42.22 | +44:37:08.2 | HIP 13804 | 31.90 |
| 2026-08-02 00:00 | 03:00:36.13 | +44:40:07.0 | HIP 13804 | 31.51 |
| 2026-08-02 12:00 | 03:00:29.75 | +44:43:05.4 | HIP 13804 | 31.38 |
| 2026-08-03 00:00 | 03:00:23.08 | +44:46:03.4 | HIP 13804 | 31.53 |
| 2026-08-03 12:00 | 03:00:16.11 | +44:49:01.0 | HIP 13804 | 31.96 |
| 2026-08-04 00:00 | 03:00:08.85 | +44:51:58.1 | HIP 13804 | 32.65 |
| 2026-08-04 12:00 | 03:00:01.29 | +44:54:54.8 | HIP 13804 | 33.59 |
| 2026-08-05 00:00 | 02:59:53.43 | +44:57:51.0 | HIP 13734 | 33.47 |
| 2026-08-05 12:00 | 02:59:45.28 | +45:00:46.8 | HIP 13734 | 31.34 |
| 2026-08-06 00:00 | 02:59:36.82 | +45:03:42.0 | HIP 13734 | 29.37 |
| 2026-08-06 12:00 | 02:59:28.06 | +45:06:36.7 | HIP 13734 | 27.59 |
| 2026-08-07 00:00 | 02:59:18.99 | +45:09:30.8 | HIP 13734 | 26.07 |
| 2026-08-07 12:00 | 02:59:09.62 | +45:12:24.5 | HIP 13734 | 24.84 |
| 2026-08-08 00:00 | 02:58:59.93 | +45:15:17.5 | HIP 13734 | 23.96 |
| 2026-08-08 12:00 | 02:58:49.94 | +45:18:09.9 | HIP 13734 | 23.48 |
| 2026-08-09 00:00 | 02:58:39.64 | +45:21:01.8 | HIP 13734 | 23.43 |
| 2026-08-09 12:00 | 02:58:29.02 | +45:23:53.0 | HIP 13734 | 23.82 |
| 2026-08-10 00:00 | 02:58:18.09 | +45:26:43.6 | HIP 13734 | 24.64 |
| 2026-08-10 12:00 | 02:58:06.84 | +45:29:33.5 | HIP 13734 | 25.86 |
| 2026-08-11 00:00 | 02:57:55.28 | +45:32:22.7 | HIP 13734 | 27.43 |
| 2026-08-11 12:00 | 02:57:43.39 | +45:35:11.2 | HIP 13774 | 26.46 |
| 2026-08-12 00:00 | 02:57:31.19 | +45:37:59.0 | HIP 13774 | 23.38 |
| 2026-08-12 12:00 | 02:57:18.67 | +45:40:46.1 | HIP 13774 | 20.44 |
| 2026-08-13 00:00 | 02:57:05.82 | +45:43:32.4 | HIP 13774 | 17.74 |
| 2026-08-13 12:00 | 02:56:52.65 | +45:46:17.9 | HIP 13774 | 15.42 |
| 2026-08-14 00:00 | 02:56:39.15 | +45:49:02.6 | HIP 13774 | 13.69 |
| 2026-08-14 12:00 | 02:56:25.33 | +45:51:46.5 | HIP 13774 | 12.83 |
| 2026-08-15 00:00 | 02:56:11.18 | +45:54:29.5 | HIP 13774 | 13.02 |
| 2026-08-15 12:00 | 02:55:56.70 | +45:57:11.6 | HIP 13774 | 14.24 |
| 2026-08-16 00:00 | 02:55:41.90 | +45:59:52.9 | HIP 13774 | 16.29 |
| 2026-08-16 12:00 | 02:55:26.76 | +46:02:33.3 | HIP 13774 | 18.90 |
| 2026-08-17 00:00 | 02:55:11.30 | +46:05:12.7 | HIP 13774 | 21.90 |
| 2026-08-17 12:00 | 02:54:55.51 | +46:07:51.2 | HIP 13774 | 25.16 |
| 2026-08-18 00:00 | 02:54:39.38 | +46:10:28.7 | HIP 13774 | 28.60 |
| 2026-08-18 12:00 | 02:54:22.92 | +46:13:05.1 | HIP 13336 | 31.78 |
| 2026-08-19 00:00 | 02:54:06.13 | +46:15:40.6 | HIP 13336 | 30.55 |