메타데이터
| 항목 |
값 |
| Designation |
C/2016 Q4 (Kowalski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-01-28T02:33:30.335040Z |
| Orbit solution date (soln_date, UTC) |
2023-05-30T09:33:32Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
12.100 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-02-13.0000000 |
| e |
0.57828825 |
| q (au) |
7.084079 |
| a (au) |
16.798390 |
| i (deg) |
7.256882 |
| Ω (om, deg) |
271.330245 |
| ω (w, deg) |
99.469482 |
| M (ma, deg) |
355.002410 |
밝기
산란 + 전체 선형
$$
M_a = (11.380 + 2.036\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.380 |
| n |
2.036 |
| gf |
0.812 |
| gb |
-0.979 |
| k |
1.000 |
| δ90 |
1.625 |
| 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 |
08:02:08.03 |
+16:40:28.3 |
HIP 39236 |
15.96 |
| 2026-05-12 12:00 |
08:02:13.01 |
+16:40:17.7 |
HIP 39236 |
16.53 |
| 2026-05-13 00:00 |
08:02:18.05 |
+16:40:06.8 |
HIP 39236 |
17.17 |
| 2026-05-13 12:00 |
08:02:23.14 |
+16:39:55.7 |
HIP 39236 |
17.87 |
| 2026-05-14 00:00 |
08:02:28.29 |
+16:39:44.5 |
HIP 39416 |
18.04 |
| 2026-05-14 12:00 |
08:02:33.50 |
+16:39:33.0 |
HIP 39416 |
17.20 |
| 2026-05-15 00:00 |
08:02:38.76 |
+16:39:21.3 |
HIP 39416 |
16.41 |
| 2026-05-15 12:00 |
08:02:44.08 |
+16:39:09.3 |
HIP 39416 |
15.67 |
| 2026-05-16 00:00 |
08:02:49.46 |
+16:38:57.2 |
HIP 39416 |
15.01 |
| 2026-05-16 12:00 |
08:02:54.89 |
+16:38:44.9 |
HIP 39416 |
14.43 |
| 2026-05-17 00:00 |
08:03:00.38 |
+16:38:32.3 |
HIP 39460 |
13.27 |
| 2026-05-17 12:00 |
08:03:05.92 |
+16:38:19.6 |
HIP 39460 |
11.94 |
| 2026-05-18 00:00 |
08:03:11.51 |
+16:38:06.6 |
HIP 39460 |
10.61 |
| 2026-05-18 12:00 |
08:03:17.16 |
+16:37:53.5 |
HIP 39460 |
9.28 |
| 2026-05-19 00:00 |
08:03:22.86 |
+16:37:40.1 |
HIP 39460 |
7.95 |
| 2026-05-19 12:00 |
08:03:28.61 |
+16:37:26.5 |
HIP 39460 |
6.62 |
| 2026-05-20 00:00 |
08:03:34.42 |
+16:37:12.7 |
HIP 39460 |
5.33 |
| 2026-05-20 12:00 |
08:03:40.28 |
+16:36:58.8 |
HIP 39460 |
4.09 |
| 2026-05-21 00:00 |
08:03:46.19 |
+16:36:44.6 |
HIP 39460 |
3.03 |
| 2026-05-21 12:00 |
08:03:52.15 |
+16:36:30.2 |
HIP 39460 |
2.38 |
| 2026-05-22 00:00 |
08:03:58.17 |
+16:36:15.6 |
HIP 39460 |
2.53 |
| 2026-05-22 12:00 |
08:04:04.23 |
+16:36:00.8 |
HIP 39460 |
3.38 |
| 2026-05-23 00:00 |
08:04:10.35 |
+16:35:45.8 |
HIP 39460 |
4.58 |
| 2026-05-23 12:00 |
08:04:16.51 |
+16:35:30.6 |
HIP 39460 |
5.92 |
| 2026-05-24 00:00 |
08:04:22.72 |
+16:35:15.2 |
HIP 39460 |
7.33 |
| 2026-05-24 12:00 |
08:04:28.99 |
+16:34:59.6 |
HIP 39460 |
8.79 |
| 2026-05-25 00:00 |
08:04:35.30 |
+16:34:43.8 |
HIP 39460 |
10.28 |
| 2026-05-25 12:00 |
08:04:41.66 |
+16:34:27.7 |
HIP 39460 |
11.79 |
| 2026-05-26 00:00 |
08:04:48.06 |
+16:34:11.5 |
HIP 39460 |
13.32 |
| 2026-05-26 12:00 |
08:04:54.52 |
+16:33:55.2 |
HIP 39460 |
14.87 |
| 2026-05-27 00:00 |
08:05:01.02 |
+16:33:38.6 |
HIP 39460 |
16.44 |
| 2026-05-27 12:00 |
08:05:07.56 |
+16:33:21.8 |
HIP 39460 |
18.02 |
| 2026-05-28 00:00 |
08:05:14.16 |
+16:33:04.8 |
HIP 39460 |
19.61 |
| 2026-05-28 12:00 |
08:05:20.80 |
+16:32:47.6 |
HIP 39460 |
21.22 |
| 2026-05-29 00:00 |
08:05:27.48 |
+16:32:30.2 |
HIP 39460 |
22.84 |
| 2026-05-29 12:00 |
08:05:34.21 |
+16:32:12.7 |
HIP 39460 |
24.47 |
| 2026-05-30 00:00 |
08:05:40.99 |
+16:31:54.9 |
HIP 39460 |
26.12 |
| 2026-05-30 12:00 |
08:05:47.81 |
+16:31:36.9 |
HIP 39460 |
27.77 |
| 2026-05-31 00:00 |
08:05:54.67 |
+16:31:18.8 |
HIP 39460 |
29.44 |
| 2026-05-31 12:00 |
08:06:01.58 |
+16:31:00.4 |
HIP 39812 |
30.64 |
| 2026-06-01 00:00 |
08:06:08.53 |
+16:30:41.9 |
HIP 39812 |
28.94 |
| 2026-06-01 12:00 |
08:06:15.52 |
+16:30:23.2 |
HIP 39812 |
27.24 |
| 2026-06-02 00:00 |
08:06:22.56 |
+16:30:04.3 |
HIP 39812 |
25.52 |