메타데이터
| 항목 |
값 |
| Designation |
C/2020 K7 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-10-28T18:33:30.147840Z |
| Orbit solution date (soln_date, UTC) |
2023-01-14T00:12:34Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
12.200 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-05-30T13:09:12.211200Z |
| Discovery magnitude (MPC) |
20.21 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-09-01.0000000 |
| e |
0.94160673 |
| q (au) |
6.383959 |
| a (au) |
109.326969 |
| i (deg) |
32.066780 |
| Ω (om, deg) |
286.109728 |
| ω (w, deg) |
358.125971 |
| M (ma, deg) |
0.265756 |
밝기
산란 + 전체 선형
$$
M_a = (10.865 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.865 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
01:09:20.22 |
+41:47:38.3 |
HIP 5493 |
20.41 |
| 2026-07-29 12:00 |
01:09:19.48 |
+41:48:35.2 |
HIP 5493 |
19.69 |
| 2026-07-30 00:00 |
01:09:18.66 |
+41:49:31.8 |
HIP 5493 |
19.01 |
| 2026-07-30 12:00 |
01:09:17.77 |
+41:50:28.0 |
HIP 5493 |
18.36 |
| 2026-07-31 00:00 |
01:09:16.80 |
+41:51:23.8 |
HIP 5493 |
17.75 |
| 2026-07-31 12:00 |
01:09:15.76 |
+41:52:19.1 |
HIP 5493 |
17.19 |
| 2026-08-01 00:00 |
01:09:14.64 |
+41:53:14.0 |
HIP 5493 |
16.68 |
| 2026-08-01 12:00 |
01:09:13.44 |
+41:54:08.5 |
HIP 5493 |
16.23 |
| 2026-08-02 00:00 |
01:09:12.17 |
+41:55:02.6 |
HIP 5493 |
15.83 |
| 2026-08-02 12:00 |
01:09:10.83 |
+41:55:56.2 |
HIP 5493 |
15.49 |
| 2026-08-03 00:00 |
01:09:09.40 |
+41:56:49.4 |
HIP 5493 |
15.22 |
| 2026-08-03 12:00 |
01:09:07.91 |
+41:57:42.1 |
HIP 5493 |
15.01 |
| 2026-08-04 00:00 |
01:09:06.34 |
+41:58:34.4 |
HIP 5493 |
14.88 |
| 2026-08-04 12:00 |
01:09:04.69 |
+41:59:26.3 |
HIP 5493 |
14.81 |
| 2026-08-05 00:00 |
01:09:02.97 |
+42:00:17.6 |
HIP 5493 |
14.82 |
| 2026-08-05 12:00 |
01:09:01.17 |
+42:01:08.6 |
HIP 5493 |
14.90 |
| 2026-08-06 00:00 |
01:08:59.30 |
+42:01:59.0 |
HIP 5493 |
15.05 |
| 2026-08-06 12:00 |
01:08:57.35 |
+42:02:49.0 |
HIP 5358 |
14.49 |
| 2026-08-07 00:00 |
01:08:55.33 |
+42:03:38.5 |
HIP 5358 |
13.59 |
| 2026-08-07 12:00 |
01:08:53.23 |
+42:04:27.6 |
HIP 5358 |
12.69 |
| 2026-08-08 00:00 |
01:08:51.06 |
+42:05:16.2 |
HIP 5358 |
11.79 |
| 2026-08-08 12:00 |
01:08:48.82 |
+42:06:04.2 |
HIP 5358 |
10.90 |
| 2026-08-09 00:00 |
01:08:46.50 |
+42:06:51.8 |
HIP 5358 |
10.01 |
| 2026-08-09 12:00 |
01:08:44.11 |
+42:07:38.9 |
HIP 5358 |
9.14 |
| 2026-08-10 00:00 |
01:08:41.64 |
+42:08:25.5 |
HIP 5358 |
8.27 |
| 2026-08-10 12:00 |
01:08:39.11 |
+42:09:11.6 |
HIP 5358 |
7.41 |
| 2026-08-11 00:00 |
01:08:36.49 |
+42:09:57.2 |
HIP 5358 |
6.57 |
| 2026-08-11 12:00 |
01:08:33.81 |
+42:10:42.2 |
HIP 5358 |
5.76 |
| 2026-08-12 00:00 |
01:08:31.05 |
+42:11:26.8 |
HIP 5358 |
4.98 |
| 2026-08-12 12:00 |
01:08:28.22 |
+42:12:10.8 |
HIP 5358 |
4.26 |
| 2026-08-13 00:00 |
01:08:25.31 |
+42:12:54.3 |
HIP 5358 |
3.64 |
| 2026-08-13 12:00 |
01:08:22.34 |
+42:13:37.3 |
HIP 5358 |
3.18 |
| 2026-08-14 00:00 |
01:08:19.29 |
+42:14:19.7 |
HIP 5358 |
2.94 |
| 2026-08-14 12:00 |
01:08:16.18 |
+42:15:01.6 |
HIP 5358 |
2.98 |
| 2026-08-15 00:00 |
01:08:12.99 |
+42:15:43.0 |
HIP 5358 |
3.30 |
| 2026-08-15 12:00 |
01:08:09.73 |
+42:16:23.9 |
HIP 5358 |
3.83 |
| 2026-08-16 00:00 |
01:08:06.40 |
+42:17:04.1 |
HIP 5358 |
4.49 |
| 2026-08-16 12:00 |
01:08:03.00 |
+42:17:43.9 |
HIP 5358 |
5.24 |
| 2026-08-17 00:00 |
01:07:59.53 |
+42:18:23.1 |
HIP 5358 |
6.04 |
| 2026-08-17 12:00 |
01:07:55.99 |
+42:19:01.7 |
HIP 5358 |
6.88 |
| 2026-08-18 00:00 |
01:07:52.38 |
+42:19:39.7 |
HIP 5358 |
7.74 |
| 2026-08-18 12:00 |
01:07:48.71 |
+42:20:17.3 |
HIP 5358 |
8.63 |
| 2026-08-19 00:00 |
01:07:44.96 |
+42:20:54.2 |
HIP 5358 |
9.52 |