메타데이터
| 항목 |
값 |
| Designation |
C/2017 K1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-03-14T18:30:37.512000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:33Z |
| Obs used |
138 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-05-01.0000000 |
| e |
1.00209402 |
| q (au) |
7.285700 |
| a (au) |
-3479.295246 |
| i (deg) |
154.008296 |
| Ω (om, deg) |
225.641843 |
| ω (w, deg) |
4.202591 |
| M (ma, deg) |
0.000227 |
밝기
산란 + 전체 선형
$$
M_a = (8.144 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.144 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.867 |
| 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) |
| 2026-07-29 00:00 |
08:23:38.27 |
+43:36:35.8 |
HIP 40979 |
26.49 |
| 2026-07-29 12:00 |
08:23:44.57 |
+43:36:21.2 |
HIP 41075 |
26.93 |
| 2026-07-30 00:00 |
08:23:50.86 |
+43:36:06.9 |
HIP 41284 |
26.54 |
| 2026-07-30 12:00 |
08:23:57.14 |
+43:35:52.9 |
HIP 41284 |
26.05 |
| 2026-07-31 00:00 |
08:24:03.42 |
+43:35:39.2 |
HIP 41284 |
25.59 |
| 2026-07-31 12:00 |
08:24:09.69 |
+43:35:25.8 |
HIP 41284 |
25.18 |
| 2026-08-01 00:00 |
08:24:15.96 |
+43:35:12.7 |
HIP 41284 |
24.81 |
| 2026-08-01 12:00 |
08:24:22.22 |
+43:35:00.0 |
HIP 41284 |
24.48 |
| 2026-08-02 00:00 |
08:24:28.47 |
+43:34:47.5 |
HIP 41284 |
24.21 |
| 2026-08-02 12:00 |
08:24:34.72 |
+43:34:35.3 |
HIP 41284 |
23.97 |
| 2026-08-03 00:00 |
08:24:40.96 |
+43:34:23.4 |
HIP 41284 |
23.79 |
| 2026-08-03 12:00 |
08:24:47.19 |
+43:34:11.8 |
HIP 41284 |
23.66 |
| 2026-08-04 00:00 |
08:24:53.41 |
+43:34:00.6 |
HIP 41284 |
23.57 |
| 2026-08-04 12:00 |
08:24:59.62 |
+43:33:49.6 |
HIP 41284 |
23.54 |
| 2026-08-05 00:00 |
08:25:05.83 |
+43:33:38.9 |
HIP 41284 |
23.55 |
| 2026-08-05 12:00 |
08:25:12.02 |
+43:33:28.6 |
HIP 41284 |
23.62 |
| 2026-08-06 00:00 |
08:25:18.20 |
+43:33:18.6 |
HIP 41284 |
23.73 |
| 2026-08-06 12:00 |
08:25:24.37 |
+43:33:08.9 |
HIP 41284 |
23.90 |
| 2026-08-07 00:00 |
08:25:30.53 |
+43:32:59.5 |
HIP 41284 |
24.10 |
| 2026-08-07 12:00 |
08:25:36.68 |
+43:32:50.4 |
HIP 41434 |
24.24 |
| 2026-08-08 00:00 |
08:25:42.81 |
+43:32:41.6 |
HIP 41434 |
23.67 |
| 2026-08-08 12:00 |
08:25:48.93 |
+43:32:33.1 |
HIP 41434 |
23.13 |
| 2026-08-09 00:00 |
08:25:55.04 |
+43:32:25.0 |
HIP 41434 |
22.62 |
| 2026-08-09 12:00 |
08:26:01.14 |
+43:32:17.2 |
HIP 41434 |
22.17 |
| 2026-08-10 00:00 |
08:26:07.22 |
+43:32:09.7 |
HIP 41434 |
21.75 |
| 2026-08-10 12:00 |
08:26:13.28 |
+43:32:02.5 |
HIP 41434 |
21.38 |
| 2026-08-11 00:00 |
08:26:19.33 |
+43:31:55.7 |
HIP 41434 |
21.05 |
| 2026-08-11 12:00 |
08:26:25.36 |
+43:31:49.1 |
HIP 41434 |
20.78 |
| 2026-08-12 00:00 |
08:26:31.38 |
+43:31:42.9 |
HIP 41434 |
20.56 |
| 2026-08-12 12:00 |
08:26:37.38 |
+43:31:37.1 |
HIP 41434 |
20.38 |
| 2026-08-13 00:00 |
08:26:43.36 |
+43:31:31.5 |
HIP 41434 |
20.26 |
| 2026-08-13 12:00 |
08:26:49.32 |
+43:31:26.3 |
HIP 41434 |
20.19 |
| 2026-08-14 00:00 |
08:26:55.27 |
+43:31:21.4 |
HIP 41434 |
20.18 |
| 2026-08-14 12:00 |
08:27:01.19 |
+43:31:16.9 |
HIP 41434 |
20.22 |
| 2026-08-15 00:00 |
08:27:07.10 |
+43:31:12.7 |
HIP 41434 |
20.30 |
| 2026-08-15 12:00 |
08:27:12.98 |
+43:31:08.8 |
HIP 41434 |
20.44 |
| 2026-08-16 00:00 |
08:27:18.85 |
+43:31:05.2 |
HIP 41434 |
20.63 |
| 2026-08-16 12:00 |
08:27:24.69 |
+43:31:02.0 |
HIP 41434 |
20.86 |
| 2026-08-17 00:00 |
08:27:30.51 |
+43:30:59.1 |
HIP 41434 |
21.14 |
| 2026-08-17 12:00 |
08:27:36.31 |
+43:30:56.5 |
HIP 41434 |
21.45 |
| 2026-08-18 00:00 |
08:27:42.09 |
+43:30:54.3 |
HIP 41434 |
21.81 |
| 2026-08-18 12:00 |
08:27:47.85 |
+43:30:52.4 |
HIP 41434 |
22.20 |
| 2026-08-19 00:00 |
08:27:53.58 |
+43:30:50.9 |
HIP 41434 |
22.63 |