C/2025 K1 (ATLAS)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/2025 K1 (ATLAS) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2025-10-08T10:33:16.145280Z |
| Orbit solution date (soln_date, UTC) | 2026-03-12T09:29:53Z |
| Obs used | 2395 |
| 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) | 2025-09-22.0000000 |
| e | 1.00025924 |
| q (au) | 0.334213 |
| a (au) | -1289.208262 |
| i (deg) | 147.864795 |
| Ω (om, deg) | 97.556954 |
| ω (w, deg) | 271.023834 |
| M (ma, deg) | -0.000350 |
밝기
산란 + 전체 선형
$$ M_a = (13.130 + 4.029\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 13.130 |
| n | 4.029 |
| gf | 1.000 |
| gb | -1.000 |
| k | 0.930 |
| 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 | +2.3424 | -1.028 |
| 2025-07-11 | 2025-09-05 | -1.3084 | +0.317 |
| 2025-09-05 | 2025-09-25 | +3.9933 | +0.381 |
| 2025-10-18 | 2025-11-19 | +0.3489 | -1.075 |
| 2025-11-19 | 2025-12-04 | -0.8988 | -0.629 |
| 2025-12-04 | 2026-01-22 | +7.0053 | -1.216 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 01:54:04.29 | +33:03:04.4 | HIP 8777 | 18.06 |
| 2026-03-26 12:00 | 01:54:29.59 | +33:04:50.0 | HIP 8777 | 23.51 |
| 2026-03-27 00:00 | 01:54:54.89 | +33:06:36.5 | HIP 8777 | 29.02 |
| 2026-03-27 12:00 | 01:55:20.17 | +33:08:23.8 | HIP 8777 | 34.56 |
| 2026-03-28 00:00 | 01:55:45.43 | +33:10:11.9 | HIP 8927 | 36.05 |
| 2026-03-28 12:00 | 01:56:10.69 | +33:12:00.9 | HIP 8927 | 36.25 |
| 2026-03-29 00:00 | 01:56:35.93 | +33:13:50.8 | HIP 9269 | 31.51 |
| 2026-03-29 12:00 | 01:57:01.15 | +33:15:41.4 | HIP 9269 | 26.38 |
| 2026-03-30 00:00 | 01:57:26.36 | +33:17:32.9 | HIP 9223 | 21.41 |
| 2026-03-30 12:00 | 01:57:51.56 | +33:19:25.1 | HIP 9223 | 16.76 |
| 2026-03-31 00:00 | 01:58:16.74 | +33:21:18.2 | HIP 9223 | 12.86 |
| 2026-03-31 12:00 | 01:58:41.90 | +33:23:12.0 | HIP 9223 | 10.58 |
| 2026-04-01 00:00 | 01:59:07.05 | +33:25:06.6 | HIP 9223 | 10.98 |
| 2026-04-01 12:00 | 01:59:32.18 | +33:27:02.0 | HIP 9223 | 13.82 |
| 2026-04-02 00:00 | 01:59:57.29 | +33:28:58.1 | HIP 9223 | 17.98 |
| 2026-04-02 12:00 | 02:00:22.38 | +33:30:55.0 | HIP 9223 | 22.75 |
| 2026-04-03 00:00 | 02:00:47.45 | +33:32:52.6 | HIP 9501 | 19.78 |
| 2026-04-03 12:00 | 02:01:12.51 | +33:34:50.9 | HIP 9501 | 16.36 |
| 2026-04-04 00:00 | 02:01:37.54 | +33:36:50.0 | HIP 9501 | 14.40 |
| 2026-04-04 12:00 | 02:02:02.55 | +33:38:49.8 | HIP 9543 | 10.33 |
| 2026-04-05 00:00 | 02:02:27.54 | +33:40:50.3 | HIP 9543 | 5.52 |
| 2026-04-05 12:00 | 02:02:52.51 | +33:42:51.5 | HIP 9543 | 4.02 |
| 2026-04-06 00:00 | 02:03:17.46 | +33:44:53.4 | HIP 9636 | 7.52 |
| 2026-04-06 12:00 | 02:03:42.38 | +33:46:56.0 | HIP 9636 | 5.33 |
| 2026-04-07 00:00 | 02:04:07.28 | +33:48:59.3 | HIP 9636 | 7.90 |
| 2026-04-07 12:00 | 02:04:32.16 | +33:51:03.3 | HIP 9636 | 12.60 |
| 2026-04-08 00:00 | 02:04:57.01 | +33:53:07.9 | HIP 9636 | 17.80 |
| 2026-04-08 12:00 | 02:05:21.84 | +33:55:13.2 | HIP 9636 | 23.17 |
| 2026-04-09 00:00 | 02:05:46.64 | +33:57:19.2 | HIP 9636 | 28.62 |
| 2026-04-09 12:00 | 02:06:11.42 | +33:59:25.8 | HIP 9636 | 34.10 |
| 2026-04-10 00:00 | 02:06:36.17 | +34:01:33.0 | HIP 9636 | 39.60 |
| 2026-04-10 12:00 | 02:07:00.89 | +34:03:40.9 | HIP 9950 | 38.43 |
| 2026-04-11 00:00 | 02:07:25.59 | +34:05:49.5 | HIP 9950 | 34.89 |
| 2026-04-11 12:00 | 02:07:50.25 | +34:07:58.6 | HIP 9950 | 31.90 |
| 2026-04-12 00:00 | 02:08:14.89 | +34:10:08.4 | HIP 9950 | 29.65 |
| 2026-04-12 12:00 | 02:08:39.50 | +34:12:18.8 | HIP 9950 | 28.29 |
| 2026-04-13 00:00 | 02:09:04.07 | +34:14:29.9 | HIP 9950 | 27.97 |
| 2026-04-13 12:00 | 02:09:28.62 | +34:16:41.5 | HIP 9950 | 28.70 |
| 2026-04-14 00:00 | 02:09:53.13 | +34:18:53.7 | HIP 9950 | 30.42 |
| 2026-04-14 12:00 | 02:10:17.61 | +34:21:06.5 | HIP 9950 | 32.97 |
| 2026-04-15 00:00 | 02:10:42.06 | +34:23:20.0 | HIP 9950 | 36.17 |
| 2026-04-15 12:00 | 02:11:06.48 | +34:25:33.9 | HIP 10400 | 35.93 |
| 2026-04-16 00:00 | 02:11:30.85 | +34:27:48.5 | HIP 10400 | 30.65 |