메타데이터
| 항목 |
값 |
| Designation |
C/2023 K1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-09-07T17:57:17.956800Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:46Z |
| Obs used |
218 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
27.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-05-27T02:15:06.998400Z |
| Discovery magnitude (MPC) |
18.64 c |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-07-23.0000000 |
| e |
0.99718017 |
| q (au) |
2.039540 |
| a (au) |
723.284257 |
| i (deg) |
137.998404 |
| Ω (om, deg) |
223.706343 |
| ω (w, deg) |
337.472407 |
| M (ma, deg) |
359.997631 |
밝기
산란 + 전체 선형
$$
M_a = (9.725 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.725 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
| 2023-05-27 |
2023-09-02 |
+17.2597 |
-6.056 |
| 2023-09-09 |
2024-03-19 |
+19.3353 |
-8.589 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
08:17:06.82 |
+60:10:18.4 |
HIP 40474 |
15.70 |
| 2026-05-12 12:00 |
08:17:10.00 |
+60:08:17.1 |
HIP 40431 |
15.47 |
| 2026-05-13 00:00 |
08:17:13.35 |
+60:06:16.1 |
HIP 40431 |
15.03 |
| 2026-05-13 12:00 |
08:17:16.89 |
+60:04:15.5 |
HIP 40431 |
14.89 |
| 2026-05-14 00:00 |
08:17:20.60 |
+60:02:15.2 |
HIP 40431 |
15.06 |
| 2026-05-14 12:00 |
08:17:24.49 |
+60:00:15.2 |
HIP 40431 |
15.52 |
| 2026-05-15 00:00 |
08:17:28.55 |
+59:58:15.6 |
HIP 40431 |
16.25 |
| 2026-05-15 12:00 |
08:17:32.78 |
+59:56:16.3 |
HIP 40431 |
17.22 |
| 2026-05-16 00:00 |
08:17:37.18 |
+59:54:17.4 |
HIP 40431 |
18.39 |
| 2026-05-16 12:00 |
08:17:41.75 |
+59:52:18.8 |
HIP 40646 |
18.08 |
| 2026-05-17 00:00 |
08:17:46.49 |
+59:50:20.6 |
HIP 40646 |
16.08 |
| 2026-05-17 12:00 |
08:17:51.40 |
+59:48:22.8 |
HIP 40646 |
14.11 |
| 2026-05-18 00:00 |
08:17:56.47 |
+59:46:25.3 |
HIP 40646 |
12.18 |
| 2026-05-18 12:00 |
08:18:01.70 |
+59:44:28.2 |
HIP 40646 |
10.30 |
| 2026-05-19 00:00 |
08:18:07.09 |
+59:42:31.5 |
HIP 40646 |
8.52 |
| 2026-05-19 12:00 |
08:18:12.64 |
+59:40:35.2 |
HIP 40646 |
6.92 |
| 2026-05-20 00:00 |
08:18:18.35 |
+59:38:39.3 |
HIP 40646 |
5.63 |
| 2026-05-20 12:00 |
08:18:24.21 |
+59:36:43.8 |
HIP 40734 |
4.17 |
| 2026-05-21 00:00 |
08:18:30.23 |
+59:34:48.7 |
HIP 40734 |
2.89 |
| 2026-05-21 12:00 |
08:18:36.40 |
+59:32:54.1 |
HIP 40734 |
2.78 |
| 2026-05-22 00:00 |
08:18:42.72 |
+59:30:59.8 |
HIP 40734 |
3.94 |
| 2026-05-22 12:00 |
08:18:49.19 |
+59:29:06.0 |
HIP 40734 |
5.63 |
| 2026-05-23 00:00 |
08:18:55.80 |
+59:27:12.6 |
HIP 40734 |
7.51 |
| 2026-05-23 12:00 |
08:19:02.56 |
+59:25:19.6 |
HIP 40734 |
9.46 |
| 2026-05-24 00:00 |
08:19:09.47 |
+59:23:27.0 |
HIP 40734 |
11.45 |
| 2026-05-24 12:00 |
08:19:16.51 |
+59:21:35.0 |
HIP 40734 |
13.46 |
| 2026-05-25 00:00 |
08:19:23.70 |
+59:19:43.3 |
HIP 40734 |
15.49 |
| 2026-05-25 12:00 |
08:19:31.03 |
+59:17:52.1 |
HIP 40734 |
17.52 |
| 2026-05-26 00:00 |
08:19:38.49 |
+59:16:01.3 |
HIP 40976 |
18.96 |
| 2026-05-26 12:00 |
08:19:46.09 |
+59:14:11.0 |
HIP 40976 |
17.18 |
| 2026-05-27 00:00 |
08:19:53.82 |
+59:12:21.2 |
HIP 40976 |
15.45 |
| 2026-05-27 12:00 |
08:20:01.69 |
+59:10:31.8 |
HIP 40976 |
13.82 |
| 2026-05-28 00:00 |
08:20:09.69 |
+59:08:42.9 |
HIP 40976 |
12.29 |
| 2026-05-28 12:00 |
08:20:17.82 |
+59:06:54.5 |
HIP 40976 |
10.94 |
| 2026-05-29 00:00 |
08:20:26.07 |
+59:05:06.5 |
HIP 40976 |
9.83 |
| 2026-05-29 12:00 |
08:20:34.46 |
+59:03:19.0 |
HIP 40976 |
9.06 |
| 2026-05-30 00:00 |
08:20:42.97 |
+59:01:32.0 |
HIP 40976 |
8.70 |
| 2026-05-30 12:00 |
08:20:51.60 |
+58:59:45.5 |
HIP 40976 |
8.82 |
| 2026-05-31 00:00 |
08:21:00.36 |
+58:57:59.4 |
HIP 40976 |
9.40 |
| 2026-05-31 12:00 |
08:21:09.24 |
+58:56:13.9 |
HIP 40976 |
10.37 |
| 2026-06-01 00:00 |
08:21:18.24 |
+58:54:28.8 |
HIP 40976 |
11.62 |
| 2026-06-01 12:00 |
08:21:27.36 |
+58:52:44.2 |
HIP 40976 |
13.08 |
| 2026-06-02 00:00 |
08:21:36.60 |
+58:51:00.1 |
HIP 40976 |
14.69 |