메타데이터
| 항목 |
값 |
| Designation |
C/2013 F3 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-05-25T06:10:32.957760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:32Z |
| Obs used |
301 |
| NEO |
- |
| M1 |
15.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-06-20.0000000 |
| e |
0.99704135 |
| q (au) |
2.252615 |
| a (au) |
761.365596 |
| i (deg) |
85.444578 |
| Ω (om, deg) |
266.108702 |
| ω (w, deg) |
18.757634 |
| M (ma, deg) |
0.001208 |
밝기
산란 + 전체 선형
$$
M_a = (14.685 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.685 |
| n |
2.000 |
| gf |
0.979 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.839 |
| 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 |
| 2013-05-31 |
2015-04-15 |
-19.7567 |
+7.281 |
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 |
05:45:39.53 |
+36:24:50.1 |
HIP 27334 |
25.52 |
| 2026-09-20 12:00 |
05:45:39.43 |
+36:24:59.3 |
HIP 27334 |
25.45 |
| 2026-09-21 00:00 |
05:45:39.28 |
+36:25:08.4 |
HIP 27334 |
25.39 |
| 2026-09-21 12:00 |
05:45:39.08 |
+36:25:17.6 |
HIP 27334 |
25.34 |
| 2026-09-22 00:00 |
05:45:38.85 |
+36:25:26.7 |
HIP 27334 |
25.29 |
| 2026-09-22 12:00 |
05:45:38.57 |
+36:25:35.8 |
HIP 27334 |
25.25 |
| 2026-09-23 00:00 |
05:45:38.25 |
+36:25:45.0 |
HIP 27334 |
25.22 |
| 2026-09-23 12:00 |
05:45:37.89 |
+36:25:54.1 |
HIP 27334 |
25.20 |
| 2026-09-24 00:00 |
05:45:37.48 |
+36:26:03.1 |
HIP 27334 |
25.19 |
| 2026-09-24 12:00 |
05:45:37.04 |
+36:26:12.2 |
HIP 27334 |
25.19 |
| 2026-09-25 00:00 |
05:45:36.55 |
+36:26:21.2 |
HIP 27334 |
25.19 |
| 2026-09-25 12:00 |
05:45:36.01 |
+36:26:30.3 |
HIP 27334 |
25.21 |
| 2026-09-26 00:00 |
05:45:35.44 |
+36:26:39.3 |
HIP 27334 |
25.23 |
| 2026-09-26 12:00 |
05:45:34.82 |
+36:26:48.2 |
HIP 27334 |
25.26 |
| 2026-09-27 00:00 |
05:45:34.15 |
+36:26:57.2 |
HIP 27334 |
25.31 |
| 2026-09-27 12:00 |
05:45:33.45 |
+36:27:06.1 |
HIP 27334 |
25.36 |
| 2026-09-28 00:00 |
05:45:32.70 |
+36:27:15.1 |
HIP 27334 |
25.42 |
| 2026-09-28 12:00 |
05:45:31.91 |
+36:27:24.0 |
HIP 27334 |
25.48 |
| 2026-09-29 00:00 |
05:45:31.08 |
+36:27:32.8 |
HIP 27334 |
25.56 |
| 2026-09-29 12:00 |
05:45:30.20 |
+36:27:41.7 |
HIP 27334 |
25.65 |
| 2026-09-30 00:00 |
05:45:29.28 |
+36:27:50.5 |
HIP 27334 |
25.75 |
| 2026-09-30 12:00 |
05:45:28.32 |
+36:27:59.2 |
HIP 27334 |
25.86 |
| 2026-10-01 00:00 |
05:45:27.32 |
+36:28:08.0 |
HIP 27334 |
25.97 |
| 2026-10-01 12:00 |
05:45:26.27 |
+36:28:16.7 |
HIP 27334 |
26.10 |
| 2026-10-02 00:00 |
05:45:25.18 |
+36:28:25.4 |
HIP 27334 |
26.24 |
| 2026-10-02 12:00 |
05:45:24.05 |
+36:28:34.0 |
HIP 27334 |
26.38 |
| 2026-10-03 00:00 |
05:45:22.87 |
+36:28:42.7 |
HIP 27334 |
26.54 |
| 2026-10-03 12:00 |
05:45:21.65 |
+36:28:51.2 |
HIP 27334 |
26.71 |
| 2026-10-04 00:00 |
05:45:20.39 |
+36:28:59.8 |
HIP 27334 |
26.89 |
| 2026-10-04 12:00 |
05:45:19.09 |
+36:29:08.3 |
HIP 27334 |
27.07 |
| 2026-10-05 00:00 |
05:45:17.74 |
+36:29:16.8 |
HIP 27334 |
27.27 |
| 2026-10-05 12:00 |
05:45:16.35 |
+36:29:25.2 |
HIP 27334 |
27.48 |
| 2026-10-06 00:00 |
05:45:14.92 |
+36:29:33.6 |
HIP 27334 |
27.70 |
| 2026-10-06 12:00 |
05:45:13.44 |
+36:29:41.9 |
HIP 27334 |
27.92 |
| 2026-10-07 00:00 |
05:45:11.93 |
+36:29:50.2 |
HIP 27334 |
28.16 |
| 2026-10-07 12:00 |
05:45:10.37 |
+36:29:58.5 |
HIP 27334 |
28.41 |
| 2026-10-08 00:00 |
05:45:08.77 |
+36:30:06.7 |
HIP 27334 |
28.67 |
| 2026-10-08 12:00 |
05:45:07.12 |
+36:30:14.9 |
HIP 27334 |
28.94 |
| 2026-10-09 00:00 |
05:45:05.43 |
+36:30:23.0 |
HIP 27334 |
29.22 |
| 2026-10-09 12:00 |
05:45:03.70 |
+36:30:31.1 |
HIP 27334 |
29.51 |
| 2026-10-10 00:00 |
05:45:01.93 |
+36:30:39.1 |
HIP 27334 |
29.81 |
| 2026-10-10 12:00 |
05:45:00.12 |
+36:30:47.0 |
HIP 27334 |
30.12 |
| 2026-10-11 00:00 |
05:44:58.26 |
+36:30:55.0 |
HIP 27334 |
30.43 |