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 |
-0.502 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
12:50:03.11 |
+55:34:59.8 |
HIP 62956 |
40.44 |
| 2026-06-03 00:00 |
12:49:55.95 |
+55:33:57.1 |
HIP 62956 |
41.87 |
| 2026-06-03 12:00 |
12:49:48.89 |
+55:32:53.9 |
HIP 62956 |
43.29 |
| 2026-06-04 00:00 |
12:49:41.92 |
+55:31:50.2 |
HIP 62956 |
44.71 |
| 2026-06-04 12:00 |
12:49:35.05 |
+55:30:46.0 |
HIP 62631 |
45.55 |
| 2026-06-05 00:00 |
12:49:28.28 |
+55:29:41.2 |
HIP 62631 |
44.57 |
| 2026-06-05 12:00 |
12:49:21.60 |
+55:28:36.0 |
HIP 62631 |
43.60 |
| 2026-06-06 00:00 |
12:49:15.01 |
+55:27:30.3 |
HIP 62631 |
42.65 |
| 2026-06-06 12:00 |
12:49:08.53 |
+55:26:24.1 |
HIP 62631 |
41.71 |
| 2026-06-07 00:00 |
12:49:02.14 |
+55:25:17.4 |
HIP 62631 |
40.80 |
| 2026-06-07 12:00 |
12:48:55.84 |
+55:24:10.3 |
HIP 62631 |
39.90 |
| 2026-06-08 00:00 |
12:48:49.65 |
+55:23:02.7 |
HIP 62631 |
39.03 |
| 2026-06-08 12:00 |
12:48:43.55 |
+55:21:54.6 |
HIP 62631 |
38.18 |
| 2026-06-09 00:00 |
12:48:37.55 |
+55:20:46.1 |
HIP 62631 |
37.36 |
| 2026-06-09 12:00 |
12:48:31.64 |
+55:19:37.1 |
HIP 62631 |
36.56 |
| 2026-06-10 00:00 |
12:48:25.83 |
+55:18:27.8 |
HIP 62631 |
35.78 |
| 2026-06-10 12:00 |
12:48:20.12 |
+55:17:17.9 |
HIP 62631 |
35.04 |
| 2026-06-11 00:00 |
12:48:14.51 |
+55:16:07.7 |
HIP 62631 |
34.33 |
| 2026-06-11 12:00 |
12:48:09.00 |
+55:14:57.0 |
HIP 62631 |
33.65 |
| 2026-06-12 00:00 |
12:48:03.58 |
+55:13:46.0 |
HIP 62220 |
32.70 |
| 2026-06-12 12:00 |
12:47:58.26 |
+55:12:34.5 |
HIP 62220 |
31.37 |
| 2026-06-13 00:00 |
12:47:53.04 |
+55:11:22.6 |
HIP 62220 |
30.04 |
| 2026-06-13 12:00 |
12:47:47.92 |
+55:10:10.3 |
HIP 62220 |
28.74 |
| 2026-06-14 00:00 |
12:47:42.90 |
+55:08:57.7 |
HIP 62220 |
27.45 |
| 2026-06-14 12:00 |
12:47:37.98 |
+55:07:44.7 |
HIP 62220 |
26.17 |
| 2026-06-15 00:00 |
12:47:33.15 |
+55:06:31.3 |
HIP 62220 |
24.93 |
| 2026-06-15 12:00 |
12:47:28.43 |
+55:05:17.5 |
HIP 62220 |
23.70 |
| 2026-06-16 00:00 |
12:47:23.80 |
+55:04:03.4 |
HIP 62220 |
22.51 |
| 2026-06-16 12:00 |
12:47:19.27 |
+55:02:48.9 |
HIP 62220 |
21.35 |
| 2026-06-17 00:00 |
12:47:14.84 |
+55:01:34.1 |
HIP 62220 |
20.24 |
| 2026-06-17 12:00 |
12:47:10.51 |
+55:00:19.0 |
HIP 62220 |
19.17 |
| 2026-06-18 00:00 |
12:47:06.28 |
+54:59:03.5 |
HIP 62220 |
18.15 |
| 2026-06-18 12:00 |
12:47:02.15 |
+54:57:47.8 |
HIP 62220 |
17.20 |
| 2026-06-19 00:00 |
12:46:58.11 |
+54:56:31.7 |
HIP 62220 |
16.33 |
| 2026-06-19 12:00 |
12:46:54.18 |
+54:55:15.3 |
HIP 62220 |
15.55 |
| 2026-06-20 00:00 |
12:46:50.34 |
+54:53:58.6 |
HIP 62220 |
14.87 |
| 2026-06-20 12:00 |
12:46:46.60 |
+54:52:41.6 |
HIP 62220 |
14.31 |
| 2026-06-21 00:00 |
12:46:42.96 |
+54:51:24.3 |
HIP 62220 |
13.87 |
| 2026-06-21 12:00 |
12:46:39.42 |
+54:50:06.8 |
HIP 62220 |
13.59 |
| 2026-06-22 00:00 |
12:46:35.97 |
+54:48:48.9 |
HIP 62220 |
13.45 |