메타데이터
| 항목 |
값 |
| Designation |
C/2020 K8 (Catalina-ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-09-14T12:27:51.762240Z |
| Orbit solution date (soln_date, UTC) |
2021-05-31T22:42:54Z |
| Obs used |
291 |
| NEO |
- |
| M1 |
16.800 |
| K1 |
4.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-05-25T10:25:18.336000Z |
| Discovery magnitude (MPC) |
19.30 G |
| Discovery observatory (MPC) |
703 · Catalina Sky Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-07-13.0000000 |
| e |
1.00015223 |
| q (au) |
0.474575 |
| a (au) |
-3117.411049 |
| i (deg) |
31.413950 |
| Ω (om, deg) |
181.516792 |
| ω (w, deg) |
260.064417 |
| M (ma, deg) |
-0.000360 |
밝기
산란 + 전체 선형
$$
M_a = (17.114 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.114 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.706 |
| k |
0.800 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
16:11:26.24 |
+08:07:42.2 |
HIP 79277 |
22.96 |
| 2026-05-12 12:00 |
16:11:19.79 |
+08:08:11.0 |
HIP 79277 |
22.81 |
| 2026-05-13 00:00 |
16:11:13.32 |
+08:08:39.3 |
HIP 79277 |
22.76 |
| 2026-05-13 12:00 |
16:11:06.84 |
+08:09:07.2 |
HIP 79277 |
22.84 |
| 2026-05-14 00:00 |
16:11:00.35 |
+08:09:34.8 |
HIP 79277 |
23.02 |
| 2026-05-14 12:00 |
16:10:53.85 |
+08:10:01.9 |
HIP 79277 |
23.32 |
| 2026-05-15 00:00 |
16:10:47.34 |
+08:10:28.5 |
HIP 79277 |
23.72 |
| 2026-05-15 12:00 |
16:10:40.82 |
+08:10:54.8 |
HIP 79277 |
24.23 |
| 2026-05-16 00:00 |
16:10:34.29 |
+08:11:20.6 |
HIP 79277 |
24.83 |
| 2026-05-16 12:00 |
16:10:27.75 |
+08:11:46.0 |
HIP 79277 |
25.53 |
| 2026-05-17 00:00 |
16:10:21.20 |
+08:12:11.0 |
HIP 79277 |
26.30 |
| 2026-05-17 12:00 |
16:10:14.65 |
+08:12:35.6 |
HIP 79277 |
27.15 |
| 2026-05-18 00:00 |
16:10:08.09 |
+08:12:59.7 |
HIP 79277 |
28.07 |
| 2026-05-18 12:00 |
16:10:01.52 |
+08:13:23.4 |
HIP 79277 |
29.04 |
| 2026-05-19 00:00 |
16:09:54.94 |
+08:13:46.6 |
HIP 79072 |
28.21 |
| 2026-05-19 12:00 |
16:09:48.36 |
+08:14:09.4 |
HIP 79072 |
26.73 |
| 2026-05-20 00:00 |
16:09:41.78 |
+08:14:31.8 |
HIP 79072 |
25.29 |
| 2026-05-20 12:00 |
16:09:35.19 |
+08:14:53.7 |
HIP 79072 |
23.88 |
| 2026-05-21 00:00 |
16:09:28.60 |
+08:15:15.2 |
HIP 79072 |
22.51 |
| 2026-05-21 12:00 |
16:09:22.01 |
+08:15:36.2 |
HIP 79072 |
21.18 |
| 2026-05-22 00:00 |
16:09:15.42 |
+08:15:56.8 |
HIP 79072 |
19.92 |
| 2026-05-22 12:00 |
16:09:08.82 |
+08:16:17.0 |
HIP 79072 |
18.72 |
| 2026-05-23 00:00 |
16:09:02.23 |
+08:16:36.7 |
HIP 79072 |
17.61 |
| 2026-05-23 12:00 |
16:08:55.63 |
+08:16:56.0 |
HIP 79072 |
16.59 |
| 2026-05-24 00:00 |
16:08:49.03 |
+08:17:14.8 |
HIP 79072 |
15.69 |
| 2026-05-24 12:00 |
16:08:42.44 |
+08:17:33.1 |
HIP 79072 |
14.94 |
| 2026-05-25 00:00 |
16:08:35.85 |
+08:17:51.0 |
HIP 79072 |
14.34 |
| 2026-05-25 12:00 |
16:08:29.25 |
+08:18:08.5 |
HIP 79072 |
13.92 |
| 2026-05-26 00:00 |
16:08:22.67 |
+08:18:25.5 |
HIP 79072 |
13.70 |
| 2026-05-26 12:00 |
16:08:16.08 |
+08:18:42.0 |
HIP 79072 |
13.68 |
| 2026-05-27 00:00 |
16:08:09.50 |
+08:18:58.1 |
HIP 79072 |
13.87 |
| 2026-05-27 12:00 |
16:08:02.92 |
+08:19:13.8 |
HIP 79072 |
14.26 |
| 2026-05-28 00:00 |
16:07:56.35 |
+08:19:29.0 |
HIP 79072 |
14.82 |
| 2026-05-28 12:00 |
16:07:49.79 |
+08:19:43.7 |
HIP 79072 |
15.55 |
| 2026-05-29 00:00 |
16:07:43.23 |
+08:19:58.0 |
HIP 78924 |
15.62 |
| 2026-05-29 12:00 |
16:07:36.67 |
+08:20:11.8 |
HIP 78924 |
13.99 |
| 2026-05-30 00:00 |
16:07:30.13 |
+08:20:25.2 |
HIP 78924 |
12.36 |
| 2026-05-30 12:00 |
16:07:23.59 |
+08:20:38.1 |
HIP 78924 |
10.74 |
| 2026-05-31 00:00 |
16:07:17.06 |
+08:20:50.6 |
HIP 78924 |
9.13 |
| 2026-05-31 12:00 |
16:07:10.54 |
+08:21:02.6 |
HIP 78924 |
7.53 |
| 2026-06-01 00:00 |
16:07:04.03 |
+08:21:14.1 |
HIP 78924 |
5.94 |
| 2026-06-01 12:00 |
16:06:57.53 |
+08:21:25.2 |
HIP 78924 |
4.38 |
| 2026-06-02 00:00 |
16:06:51.03 |
+08:21:35.8 |
HIP 78924 |
2.90 |