메타데이터
| 항목 |
값 |
| Designation |
C/2020 K4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-03-06T12:03:58.541760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:07Z |
| Obs used |
48 |
| NEO |
- |
| M1 |
17.900 |
| K1 |
6.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-05-20T12:49:01.488000Z |
| Discovery magnitude (MPC) |
19.78 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-06-16.0000000 |
| e |
0.96121938 |
| q (au) |
1.772742 |
| a (au) |
45.712051 |
| i (deg) |
125.914307 |
| Ω (om, deg) |
264.105134 |
| ω (w, deg) |
310.291834 |
| M (ma, deg) |
0.323677 |
밝기
산란 + 전체 선형
$$
M_a = (17.090 + 2.376\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.090 |
| n |
2.376 |
| gf |
1.000 |
| 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) |
| 2026-05-12 00:00 |
12:56:36.04 |
+56:10:16.8 |
HIP 63089 |
8.57 |
| 2026-05-12 12:00 |
12:56:25.15 |
+56:09:42.3 |
HIP 63089 |
7.23 |
| 2026-05-13 00:00 |
12:56:14.34 |
+56:09:07.1 |
HIP 63089 |
6.04 |
| 2026-05-13 12:00 |
12:56:03.60 |
+56:08:31.1 |
HIP 63089 |
5.11 |
| 2026-05-14 00:00 |
12:55:52.93 |
+56:07:54.3 |
HIP 63089 |
4.59 |
| 2026-05-14 12:00 |
12:55:42.35 |
+56:07:16.7 |
HIP 63089 |
4.61 |
| 2026-05-15 00:00 |
12:55:31.84 |
+56:06:38.4 |
HIP 63089 |
5.17 |
| 2026-05-15 12:00 |
12:55:21.41 |
+56:05:59.3 |
HIP 63089 |
6.12 |
| 2026-05-16 00:00 |
12:55:11.06 |
+56:05:19.5 |
HIP 63089 |
7.30 |
| 2026-05-16 12:00 |
12:55:00.79 |
+56:04:38.9 |
HIP 63089 |
8.62 |
| 2026-05-17 00:00 |
12:54:50.60 |
+56:03:57.6 |
HIP 62956 |
9.35 |
| 2026-05-17 12:00 |
12:54:40.49 |
+56:03:15.5 |
HIP 62956 |
7.85 |
| 2026-05-18 00:00 |
12:54:30.47 |
+56:02:32.7 |
HIP 62956 |
6.39 |
| 2026-05-18 12:00 |
12:54:20.52 |
+56:01:49.2 |
HIP 62956 |
4.99 |
| 2026-05-19 00:00 |
12:54:10.66 |
+56:01:04.9 |
HIP 62956 |
3.71 |
| 2026-05-19 12:00 |
12:54:00.89 |
+56:00:20.0 |
HIP 62956 |
2.74 |
| 2026-05-20 00:00 |
12:53:51.19 |
+55:59:34.3 |
HIP 62956 |
2.46 |
| 2026-05-20 12:00 |
12:53:41.59 |
+55:58:48.0 |
HIP 62956 |
3.05 |
| 2026-05-21 00:00 |
12:53:32.07 |
+55:58:01.0 |
HIP 62956 |
4.16 |
| 2026-05-21 12:00 |
12:53:22.63 |
+55:57:13.2 |
HIP 62956 |
5.47 |
| 2026-05-22 00:00 |
12:53:13.28 |
+55:56:24.8 |
HIP 62956 |
6.87 |
| 2026-05-22 12:00 |
12:53:04.02 |
+55:55:35.8 |
HIP 62956 |
8.31 |
| 2026-05-23 00:00 |
12:52:54.85 |
+55:54:46.0 |
HIP 62956 |
9.77 |
| 2026-05-23 12:00 |
12:52:45.76 |
+55:53:55.6 |
HIP 62956 |
11.24 |
| 2026-05-24 00:00 |
12:52:36.77 |
+55:53:04.6 |
HIP 62956 |
12.72 |
| 2026-05-24 12:00 |
12:52:27.86 |
+55:52:12.9 |
HIP 62956 |
14.20 |
| 2026-05-25 00:00 |
12:52:19.04 |
+55:51:20.6 |
HIP 62956 |
15.68 |
| 2026-05-25 12:00 |
12:52:10.31 |
+55:50:27.6 |
HIP 62956 |
17.15 |
| 2026-05-26 00:00 |
12:52:01.67 |
+55:49:34.1 |
HIP 62956 |
18.63 |
| 2026-05-26 12:00 |
12:51:53.12 |
+55:48:39.9 |
HIP 62956 |
20.11 |
| 2026-05-27 00:00 |
12:51:44.66 |
+55:47:45.1 |
HIP 62956 |
21.58 |
| 2026-05-27 12:00 |
12:51:36.30 |
+55:46:49.7 |
HIP 62956 |
23.05 |
| 2026-05-28 00:00 |
12:51:28.02 |
+55:45:53.7 |
HIP 62956 |
24.52 |
| 2026-05-28 12:00 |
12:51:19.84 |
+55:44:57.1 |
HIP 62956 |
25.99 |
| 2026-05-29 00:00 |
12:51:11.74 |
+55:43:59.9 |
HIP 62956 |
27.45 |
| 2026-05-29 12:00 |
12:51:03.74 |
+55:43:02.1 |
HIP 62956 |
28.90 |
| 2026-05-30 00:00 |
12:50:55.84 |
+55:42:03.8 |
HIP 62956 |
30.36 |
| 2026-05-30 12:00 |
12:50:48.02 |
+55:41:04.8 |
HIP 62956 |
31.81 |
| 2026-05-31 00:00 |
12:50:40.30 |
+55:40:05.4 |
HIP 62956 |
33.26 |
| 2026-05-31 12:00 |
12:50:32.68 |
+55:39:05.4 |
HIP 62956 |
34.70 |
| 2026-06-01 00:00 |
12:50:25.14 |
+55:38:04.8 |
HIP 62956 |
36.14 |
| 2026-06-01 12:00 |
12:50:17.70 |
+55:37:03.7 |
HIP 62956 |
37.58 |
| 2026-06-02 00:00 |
12:50:10.36 |
+55:36:02.0 |
HIP 62956 |
39.01 |