메타데이터
| 항목 |
값 |
| Designation |
C/2015 F5 (SWAN-Xingming) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-03-28T02:23:27.029760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:09Z |
| Obs used |
209 |
| NEO |
Yes |
| M1 |
14.100 |
| K1 |
4.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-04-22.0000000 |
| e |
0.97774875 |
| q (au) |
0.346004 |
| a (au) |
15.549862 |
| i (deg) |
149.256648 |
| Ω (om, deg) |
287.739679 |
| ω (w, deg) |
13.393236 |
| M (ma, deg) |
0.400240 |
밝기
산란 + 전체 선형
$$
M_a = (17.117 + 4.165\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.117 |
| n |
4.165 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2015-04-04 |
2015-06-07 |
-4.5612 |
-1.918 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
07:03:50.78 |
+19:35:05.6 |
HIP 34016 |
22.32 |
| 2026-09-20 12:00 |
07:03:52.14 |
+19:34:58.0 |
HIP 34016 |
22.27 |
| 2026-09-21 00:00 |
07:03:53.45 |
+19:34:50.6 |
HIP 34016 |
22.23 |
| 2026-09-21 12:00 |
07:03:54.72 |
+19:34:43.2 |
HIP 34016 |
22.19 |
| 2026-09-22 00:00 |
07:03:55.95 |
+19:34:35.8 |
HIP 34016 |
22.15 |
| 2026-09-22 12:00 |
07:03:57.14 |
+19:34:28.5 |
HIP 34016 |
22.11 |
| 2026-09-23 00:00 |
07:03:58.28 |
+19:34:21.3 |
HIP 34016 |
22.08 |
| 2026-09-23 12:00 |
07:03:59.37 |
+19:34:14.1 |
HIP 34016 |
22.04 |
| 2026-09-24 00:00 |
07:04:00.42 |
+19:34:06.9 |
HIP 34016 |
22.01 |
| 2026-09-24 12:00 |
07:04:01.43 |
+19:33:59.9 |
HIP 34016 |
21.98 |
| 2026-09-25 00:00 |
07:04:02.39 |
+19:33:52.8 |
HIP 34016 |
21.95 |
| 2026-09-25 12:00 |
07:04:03.31 |
+19:33:45.9 |
HIP 34016 |
21.91 |
| 2026-09-26 00:00 |
07:04:04.18 |
+19:33:39.0 |
HIP 34016 |
21.88 |
| 2026-09-26 12:00 |
07:04:05.01 |
+19:33:32.1 |
HIP 34016 |
21.85 |
| 2026-09-27 00:00 |
07:04:05.79 |
+19:33:25.4 |
HIP 34016 |
21.82 |
| 2026-09-27 12:00 |
07:04:06.53 |
+19:33:18.6 |
HIP 34016 |
21.78 |
| 2026-09-28 00:00 |
07:04:07.22 |
+19:33:12.0 |
HIP 34016 |
21.75 |
| 2026-09-28 12:00 |
07:04:07.86 |
+19:33:05.4 |
HIP 34016 |
21.71 |
| 2026-09-29 00:00 |
07:04:08.46 |
+19:32:58.8 |
HIP 34016 |
21.67 |
| 2026-09-29 12:00 |
07:04:09.01 |
+19:32:52.3 |
HIP 34016 |
21.63 |
| 2026-09-30 00:00 |
07:04:09.52 |
+19:32:45.9 |
HIP 34016 |
21.58 |
| 2026-09-30 12:00 |
07:04:09.98 |
+19:32:39.6 |
HIP 34016 |
21.53 |
| 2026-10-01 00:00 |
07:04:10.40 |
+19:32:33.3 |
HIP 34016 |
21.48 |
| 2026-10-01 12:00 |
07:04:10.77 |
+19:32:27.1 |
HIP 34016 |
21.43 |
| 2026-10-02 00:00 |
07:04:11.09 |
+19:32:20.9 |
HIP 34016 |
21.37 |
| 2026-10-02 12:00 |
07:04:11.36 |
+19:32:14.8 |
HIP 34016 |
21.31 |
| 2026-10-03 00:00 |
07:04:11.59 |
+19:32:08.8 |
HIP 34016 |
21.25 |
| 2026-10-03 12:00 |
07:04:11.77 |
+19:32:02.8 |
HIP 34016 |
21.18 |
| 2026-10-04 00:00 |
07:04:11.91 |
+19:31:56.9 |
HIP 34016 |
21.11 |
| 2026-10-04 12:00 |
07:04:11.99 |
+19:31:51.1 |
HIP 34016 |
21.03 |
| 2026-10-05 00:00 |
07:04:12.03 |
+19:31:45.3 |
HIP 34016 |
20.95 |
| 2026-10-05 12:00 |
07:04:12.03 |
+19:31:39.6 |
HIP 34016 |
20.87 |
| 2026-10-06 00:00 |
07:04:11.97 |
+19:31:34.0 |
HIP 34016 |
20.78 |
| 2026-10-06 12:00 |
07:04:11.87 |
+19:31:28.4 |
HIP 34016 |
20.68 |
| 2026-10-07 00:00 |
07:04:11.72 |
+19:31:22.9 |
HIP 34016 |
20.59 |
| 2026-10-07 12:00 |
07:04:11.52 |
+19:31:17.5 |
HIP 34016 |
20.49 |
| 2026-10-08 00:00 |
07:04:11.27 |
+19:31:12.1 |
HIP 34016 |
20.38 |
| 2026-10-08 12:00 |
07:04:10.98 |
+19:31:06.8 |
HIP 34016 |
20.27 |
| 2026-10-09 00:00 |
07:04:10.64 |
+19:31:01.6 |
HIP 34016 |
20.15 |
| 2026-10-09 12:00 |
07:04:10.25 |
+19:30:56.5 |
HIP 34016 |
20.03 |
| 2026-10-10 00:00 |
07:04:09.81 |
+19:30:51.4 |
HIP 34016 |
19.91 |
| 2026-10-10 12:00 |
07:04:09.32 |
+19:30:46.4 |
HIP 34016 |
19.78 |
| 2026-10-11 00:00 |
07:04:08.79 |
+19:30:41.5 |
HIP 34016 |
19.65 |