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 |
0.999 |
| 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) |
| 2026-05-12 00:00 |
08:11:30.19 |
+44:59:54.7 |
HIP 40149 |
13.38 |
| 2026-05-12 12:00 |
08:11:31.37 |
+44:59:12.6 |
HIP 40149 |
13.98 |
| 2026-05-13 00:00 |
08:11:32.62 |
+44:58:30.6 |
HIP 40149 |
14.59 |
| 2026-05-13 12:00 |
08:11:33.94 |
+44:57:48.6 |
HIP 40149 |
15.21 |
| 2026-05-14 00:00 |
08:11:35.32 |
+44:57:06.6 |
HIP 40149 |
15.84 |
| 2026-05-14 12:00 |
08:11:36.77 |
+44:56:24.6 |
HIP 40149 |
16.47 |
| 2026-05-15 00:00 |
08:11:38.29 |
+44:55:42.6 |
HIP 40149 |
17.11 |
| 2026-05-15 12:00 |
08:11:39.87 |
+44:55:00.7 |
HIP 40149 |
17.75 |
| 2026-05-16 00:00 |
08:11:41.51 |
+44:54:18.8 |
HIP 40149 |
18.40 |
| 2026-05-16 12:00 |
08:11:43.23 |
+44:53:36.9 |
HIP 40149 |
19.06 |
| 2026-05-17 00:00 |
08:11:45.00 |
+44:52:55.1 |
HIP 40149 |
19.72 |
| 2026-05-17 12:00 |
08:11:46.84 |
+44:52:13.3 |
HIP 40149 |
20.39 |
| 2026-05-18 00:00 |
08:11:48.75 |
+44:51:31.5 |
HIP 40149 |
21.06 |
| 2026-05-18 12:00 |
08:11:50.72 |
+44:50:49.8 |
HIP 40149 |
21.74 |
| 2026-05-19 00:00 |
08:11:52.75 |
+44:50:08.1 |
HIP 40149 |
22.43 |
| 2026-05-19 12:00 |
08:11:54.84 |
+44:49:26.5 |
HIP 40149 |
23.12 |
| 2026-05-20 00:00 |
08:11:57.00 |
+44:48:45.0 |
HIP 40332 |
23.49 |
| 2026-05-20 12:00 |
08:11:59.21 |
+44:48:03.5 |
HIP 40332 |
22.96 |
| 2026-05-21 00:00 |
08:12:01.49 |
+44:47:22.0 |
HIP 40332 |
22.44 |
| 2026-05-21 12:00 |
08:12:03.83 |
+44:46:40.6 |
HIP 40332 |
21.92 |
| 2026-05-22 00:00 |
08:12:06.23 |
+44:45:59.3 |
HIP 40332 |
21.40 |
| 2026-05-22 12:00 |
08:12:08.68 |
+44:45:18.0 |
HIP 40332 |
20.90 |
| 2026-05-23 00:00 |
08:12:11.20 |
+44:44:36.8 |
HIP 40332 |
20.41 |
| 2026-05-23 12:00 |
08:12:13.78 |
+44:43:55.7 |
HIP 40332 |
19.92 |
| 2026-05-24 00:00 |
08:12:16.41 |
+44:43:14.7 |
HIP 40332 |
19.45 |
| 2026-05-24 12:00 |
08:12:19.10 |
+44:42:33.7 |
HIP 40332 |
18.99 |
| 2026-05-25 00:00 |
08:12:21.85 |
+44:41:52.8 |
HIP 40332 |
18.55 |
| 2026-05-25 12:00 |
08:12:24.66 |
+44:41:12.0 |
HIP 40332 |
18.13 |
| 2026-05-26 00:00 |
08:12:27.52 |
+44:40:31.3 |
HIP 40332 |
17.72 |
| 2026-05-26 12:00 |
08:12:30.44 |
+44:39:50.7 |
HIP 40332 |
17.34 |
| 2026-05-27 00:00 |
08:12:33.41 |
+44:39:10.1 |
HIP 40332 |
16.98 |
| 2026-05-27 12:00 |
08:12:36.44 |
+44:38:29.6 |
HIP 40332 |
16.65 |
| 2026-05-28 00:00 |
08:12:39.53 |
+44:37:49.3 |
HIP 40332 |
16.34 |
| 2026-05-28 12:00 |
08:12:42.67 |
+44:37:09.0 |
HIP 40332 |
16.07 |
| 2026-05-29 00:00 |
08:12:45.86 |
+44:36:28.8 |
HIP 40332 |
15.83 |
| 2026-05-29 12:00 |
08:12:49.10 |
+44:35:48.7 |
HIP 40332 |
15.63 |
| 2026-05-30 00:00 |
08:12:52.40 |
+44:35:08.7 |
HIP 40332 |
15.47 |
| 2026-05-30 12:00 |
08:12:55.75 |
+44:34:28.9 |
HIP 40332 |
15.35 |
| 2026-05-31 00:00 |
08:12:59.16 |
+44:33:49.1 |
HIP 40332 |
15.27 |
| 2026-05-31 12:00 |
08:13:02.61 |
+44:33:09.4 |
HIP 40332 |
15.24 |
| 2026-06-01 00:00 |
08:13:06.12 |
+44:32:29.9 |
HIP 40332 |
15.25 |
| 2026-06-01 12:00 |
08:13:09.67 |
+44:31:50.4 |
HIP 40332 |
15.30 |
| 2026-06-02 00:00 |
08:13:13.28 |
+44:31:11.1 |
HIP 40332 |
15.41 |