메타데이터
| 항목 |
값 |
| Designation |
C/2015 K2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-06-08T19:07:06.248640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:11Z |
| Obs used |
54 |
| NEO |
- |
| M1 |
20.700 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-05-26.0000000 |
| e |
0.99444359 |
| q (au) |
1.455282 |
| a (au) |
261.910605 |
| i (deg) |
29.110346 |
| Ω (om, deg) |
223.713883 |
| ω (w, deg) |
15.770089 |
| M (ma, deg) |
359.996792 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 3.100\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
3.100 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
02:06:41.91 |
+18:27:04.8 |
HIP 9824 |
3.70 |
| 2026-09-20 12:00 |
02:06:38.53 |
+18:26:49.3 |
HIP 9824 |
3.19 |
| 2026-09-21 00:00 |
02:06:35.13 |
+18:26:33.6 |
HIP 9824 |
2.85 |
| 2026-09-21 12:00 |
02:06:31.71 |
+18:26:17.7 |
HIP 9824 |
2.73 |
| 2026-09-22 00:00 |
02:06:28.26 |
+18:26:01.6 |
HIP 9824 |
2.88 |
| 2026-09-22 12:00 |
02:06:24.79 |
+18:25:45.4 |
HIP 9824 |
3.26 |
| 2026-09-23 00:00 |
02:06:21.30 |
+18:25:29.0 |
HIP 9824 |
3.80 |
| 2026-09-23 12:00 |
02:06:17.78 |
+18:25:12.5 |
HIP 9824 |
4.46 |
| 2026-09-24 00:00 |
02:06:14.25 |
+18:24:55.8 |
HIP 9824 |
5.19 |
| 2026-09-24 12:00 |
02:06:10.69 |
+18:24:38.9 |
HIP 9824 |
5.96 |
| 2026-09-25 00:00 |
02:06:07.11 |
+18:24:21.8 |
HIP 9824 |
6.77 |
| 2026-09-25 12:00 |
02:06:03.51 |
+18:24:04.6 |
HIP 9824 |
7.61 |
| 2026-09-26 00:00 |
02:05:59.89 |
+18:23:47.3 |
HIP 9824 |
8.46 |
| 2026-09-26 12:00 |
02:05:56.25 |
+18:23:29.8 |
HIP 9824 |
9.33 |
| 2026-09-27 00:00 |
02:05:52.59 |
+18:23:12.1 |
HIP 9824 |
10.21 |
| 2026-09-27 12:00 |
02:05:48.90 |
+18:22:54.2 |
HIP 9824 |
11.11 |
| 2026-09-28 00:00 |
02:05:45.20 |
+18:22:36.2 |
HIP 9824 |
12.01 |
| 2026-09-28 12:00 |
02:05:41.48 |
+18:22:18.1 |
HIP 9824 |
12.92 |
| 2026-09-29 00:00 |
02:05:37.75 |
+18:21:59.8 |
HIP 9824 |
13.84 |
| 2026-09-29 12:00 |
02:05:33.99 |
+18:21:41.4 |
HIP 9824 |
14.77 |
| 2026-09-30 00:00 |
02:05:30.21 |
+18:21:22.8 |
HIP 9824 |
15.70 |
| 2026-09-30 12:00 |
02:05:26.42 |
+18:21:04.0 |
HIP 9824 |
16.64 |
| 2026-10-01 00:00 |
02:05:22.61 |
+18:20:45.1 |
HIP 9824 |
17.59 |
| 2026-10-01 12:00 |
02:05:18.78 |
+18:20:26.1 |
HIP 9824 |
18.54 |
| 2026-10-02 00:00 |
02:05:14.93 |
+18:20:06.9 |
HIP 9824 |
19.50 |
| 2026-10-02 12:00 |
02:05:11.07 |
+18:19:47.5 |
HIP 9824 |
20.46 |
| 2026-10-03 00:00 |
02:05:07.18 |
+18:19:28.0 |
HIP 9627 |
20.52 |
| 2026-10-03 12:00 |
02:05:03.29 |
+18:19:08.4 |
HIP 9627 |
19.55 |
| 2026-10-04 00:00 |
02:04:59.38 |
+18:18:48.6 |
HIP 9627 |
18.58 |
| 2026-10-04 12:00 |
02:04:55.45 |
+18:18:28.7 |
HIP 9627 |
17.60 |
| 2026-10-05 00:00 |
02:04:51.50 |
+18:18:08.7 |
HIP 9627 |
16.62 |
| 2026-10-05 12:00 |
02:04:47.55 |
+18:17:48.5 |
HIP 9627 |
15.63 |
| 2026-10-06 00:00 |
02:04:43.57 |
+18:17:28.2 |
HIP 9627 |
14.65 |
| 2026-10-06 12:00 |
02:04:39.58 |
+18:17:07.7 |
HIP 9627 |
13.66 |
| 2026-10-07 00:00 |
02:04:35.58 |
+18:16:47.1 |
HIP 9627 |
12.67 |
| 2026-10-07 12:00 |
02:04:31.57 |
+18:16:26.4 |
HIP 9627 |
11.69 |
| 2026-10-08 00:00 |
02:04:27.54 |
+18:16:05.6 |
HIP 9627 |
10.70 |
| 2026-10-08 12:00 |
02:04:23.50 |
+18:15:44.6 |
HIP 9627 |
9.72 |
| 2026-10-09 00:00 |
02:04:19.45 |
+18:15:23.5 |
HIP 9627 |
8.75 |
| 2026-10-09 12:00 |
02:04:15.38 |
+18:15:02.3 |
HIP 9627 |
7.78 |
| 2026-10-10 00:00 |
02:04:11.30 |
+18:14:40.9 |
HIP 9627 |
6.83 |
| 2026-10-10 12:00 |
02:04:07.21 |
+18:14:19.4 |
HIP 9627 |
5.91 |
| 2026-10-11 00:00 |
02:04:03.11 |
+18:13:57.9 |
HIP 9627 |
5.02 |