메타데이터
| 항목 |
값 |
| Designation |
C/2015 F2 (Polonia) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-04-28T19:46:02.029440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:09Z |
| Obs used |
308 |
| NEO |
- |
| M1 |
14.900 |
| K1 |
21.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-05-14.0000000 |
| e |
0.96844230 |
| q (au) |
1.210552 |
| a (au) |
38.359944 |
| i (deg) |
28.693745 |
| Ω (om, deg) |
262.551624 |
| ω (w, deg) |
352.034051 |
| M (ma, deg) |
0.062959 |
밝기
산란 + 전체 선형
$$
M_a = (15.056 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.056 |
| n |
6.000 |
| gf |
0.996 |
| gb |
-0.501 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
03:25:25.64 |
+32:05:51.7 |
HIP 15937 |
17.10 |
| 2026-06-01 12:00 |
03:25:30.95 |
+32:06:11.2 |
HIP 15937 |
16.99 |
| 2026-06-02 00:00 |
03:25:36.25 |
+32:06:30.8 |
HIP 15937 |
16.96 |
| 2026-06-02 12:00 |
03:25:41.53 |
+32:06:50.4 |
HIP 15937 |
17.01 |
| 2026-06-03 00:00 |
03:25:46.80 |
+32:07:10.1 |
HIP 15937 |
17.13 |
| 2026-06-03 12:00 |
03:25:52.06 |
+32:07:29.9 |
HIP 15937 |
17.33 |
| 2026-06-04 00:00 |
03:25:57.31 |
+32:07:49.7 |
HIP 15937 |
17.60 |
| 2026-06-04 12:00 |
03:26:02.54 |
+32:08:09.6 |
HIP 15937 |
17.93 |
| 2026-06-05 00:00 |
03:26:07.76 |
+32:08:29.6 |
HIP 15937 |
18.34 |
| 2026-06-05 12:00 |
03:26:12.97 |
+32:08:49.6 |
HIP 15937 |
18.80 |
| 2026-06-06 00:00 |
03:26:18.16 |
+32:09:09.7 |
HIP 15937 |
19.31 |
| 2026-06-06 12:00 |
03:26:23.33 |
+32:09:29.9 |
HIP 15937 |
19.88 |
| 2026-06-07 00:00 |
03:26:28.49 |
+32:09:50.1 |
HIP 15937 |
20.49 |
| 2026-06-07 12:00 |
03:26:33.64 |
+32:10:10.4 |
HIP 16034 |
20.89 |
| 2026-06-08 00:00 |
03:26:38.77 |
+32:10:30.8 |
HIP 16034 |
21.29 |
| 2026-06-08 12:00 |
03:26:43.88 |
+32:10:51.2 |
HIP 16034 |
21.74 |
| 2026-06-09 00:00 |
03:26:48.98 |
+32:11:11.6 |
HIP 16034 |
22.24 |
| 2026-06-09 12:00 |
03:26:54.06 |
+32:11:32.2 |
HIP 16034 |
22.79 |
| 2026-06-10 00:00 |
03:26:59.12 |
+32:11:52.7 |
HIP 16034 |
23.37 |
| 2026-06-10 12:00 |
03:27:04.17 |
+32:12:13.4 |
HIP 16161 |
22.93 |
| 2026-06-11 00:00 |
03:27:09.20 |
+32:12:34.1 |
HIP 16161 |
22.52 |
| 2026-06-11 12:00 |
03:27:14.21 |
+32:12:54.8 |
HIP 16161 |
22.17 |
| 2026-06-12 00:00 |
03:27:19.21 |
+32:13:15.6 |
HIP 16161 |
21.86 |
| 2026-06-12 12:00 |
03:27:24.18 |
+32:13:36.4 |
HIP 16161 |
21.61 |
| 2026-06-13 00:00 |
03:27:29.14 |
+32:13:57.3 |
HIP 16161 |
21.42 |
| 2026-06-13 12:00 |
03:27:34.07 |
+32:14:18.2 |
HIP 16161 |
21.29 |
| 2026-06-14 00:00 |
03:27:38.99 |
+32:14:39.2 |
HIP 16161 |
21.21 |
| 2026-06-14 12:00 |
03:27:43.89 |
+32:15:00.2 |
HIP 16161 |
21.20 |
| 2026-06-15 00:00 |
03:27:48.77 |
+32:15:21.3 |
HIP 16161 |
21.24 |
| 2026-06-15 12:00 |
03:27:53.63 |
+32:15:42.3 |
HIP 16161 |
21.34 |
| 2026-06-16 00:00 |
03:27:58.46 |
+32:16:03.5 |
HIP 16161 |
21.49 |
| 2026-06-16 12:00 |
03:28:03.28 |
+32:16:24.7 |
HIP 16161 |
21.70 |
| 2026-06-17 00:00 |
03:28:08.07 |
+32:16:45.9 |
HIP 16161 |
21.97 |
| 2026-06-17 12:00 |
03:28:12.84 |
+32:17:07.1 |
HIP 16161 |
22.28 |
| 2026-06-18 00:00 |
03:28:17.60 |
+32:17:28.4 |
HIP 16161 |
22.64 |
| 2026-06-18 12:00 |
03:28:22.32 |
+32:17:49.7 |
HIP 16161 |
23.04 |
| 2026-06-19 00:00 |
03:28:27.03 |
+32:18:11.0 |
HIP 16161 |
23.48 |
| 2026-06-19 12:00 |
03:28:31.71 |
+32:18:32.4 |
HIP 16161 |
23.96 |
| 2026-06-20 00:00 |
03:28:36.37 |
+32:18:53.8 |
HIP 16161 |
24.48 |
| 2026-06-20 12:00 |
03:28:41.01 |
+32:19:15.2 |
HIP 16161 |
25.03 |
| 2026-06-21 00:00 |
03:28:45.62 |
+32:19:36.7 |
HIP 16161 |
25.61 |
| 2026-06-21 12:00 |
03:28:50.21 |
+32:19:58.2 |
HIP 16161 |
26.22 |
| 2026-06-22 00:00 |
03:28:54.77 |
+32:20:19.7 |
HIP 16161 |
26.85 |