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
$$
M_a = (14.683 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.683 |
| n |
2.000 |
| gf |
0.998 |
| gb |
-0.997 |
| k |
1.000 |
| δ90 |
9.992 |
| 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 |
-19.7588 |
+7.282 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
05:25:55.13 |
+36:35:31.0 |
HIP 25301 |
27.45 |
| 2026-03-26 12:00 |
05:25:56.31 |
+36:35:13.3 |
HIP 25301 |
27.32 |
| 2026-03-27 00:00 |
05:25:57.53 |
+36:34:55.6 |
HIP 25301 |
27.20 |
| 2026-03-27 12:00 |
05:25:58.79 |
+36:34:38.1 |
HIP 25301 |
27.09 |
| 2026-03-28 00:00 |
05:26:00.09 |
+36:34:20.6 |
HIP 25301 |
27.00 |
| 2026-03-28 12:00 |
05:26:01.44 |
+36:34:03.2 |
HIP 25301 |
26.91 |
| 2026-03-29 00:00 |
05:26:02.82 |
+36:33:45.8 |
HIP 25301 |
26.84 |
| 2026-03-29 12:00 |
05:26:04.25 |
+36:33:28.6 |
HIP 25301 |
26.78 |
| 2026-03-30 00:00 |
05:26:05.72 |
+36:33:11.4 |
HIP 25301 |
26.73 |
| 2026-03-30 12:00 |
05:26:07.23 |
+36:32:54.2 |
HIP 25301 |
26.69 |
| 2026-03-31 00:00 |
05:26:08.78 |
+36:32:37.2 |
HIP 25301 |
26.66 |
| 2026-03-31 12:00 |
05:26:10.37 |
+36:32:20.2 |
HIP 25301 |
26.65 |
| 2026-04-01 00:00 |
05:26:12.00 |
+36:32:03.3 |
HIP 25301 |
26.65 |
| 2026-04-01 12:00 |
05:26:13.67 |
+36:31:46.5 |
HIP 25301 |
26.67 |
| 2026-04-02 00:00 |
05:26:15.37 |
+36:31:29.8 |
HIP 25301 |
26.70 |
| 2026-04-02 12:00 |
05:26:17.12 |
+36:31:13.2 |
HIP 25301 |
26.74 |
| 2026-04-03 00:00 |
05:26:18.91 |
+36:30:56.6 |
HIP 25301 |
26.79 |
| 2026-04-03 12:00 |
05:26:20.74 |
+36:30:40.1 |
HIP 25301 |
26.86 |
| 2026-04-04 00:00 |
05:26:22.60 |
+36:30:23.7 |
HIP 25301 |
26.95 |
| 2026-04-04 12:00 |
05:26:24.51 |
+36:30:07.3 |
HIP 25301 |
27.05 |
| 2026-04-05 00:00 |
05:26:26.45 |
+36:29:51.1 |
HIP 25301 |
27.16 |
| 2026-04-05 12:00 |
05:26:28.44 |
+36:29:34.9 |
HIP 25301 |
27.29 |
| 2026-04-06 00:00 |
05:26:30.46 |
+36:29:18.8 |
HIP 25301 |
27.43 |
| 2026-04-06 12:00 |
05:26:32.52 |
+36:29:02.8 |
HIP 25301 |
27.59 |
| 2026-04-07 00:00 |
05:26:34.61 |
+36:28:46.9 |
HIP 25301 |
27.76 |
| 2026-04-07 12:00 |
05:26:36.75 |
+36:28:31.1 |
HIP 25301 |
27.95 |
| 2026-04-08 00:00 |
05:26:38.92 |
+36:28:15.4 |
HIP 25301 |
28.15 |
| 2026-04-08 12:00 |
05:26:41.13 |
+36:27:59.7 |
HIP 25301 |
28.37 |
| 2026-04-09 00:00 |
05:26:43.38 |
+36:27:44.1 |
HIP 25301 |
28.60 |
| 2026-04-09 12:00 |
05:26:45.66 |
+36:27:28.6 |
HIP 25301 |
28.85 |
| 2026-04-10 00:00 |
05:26:47.98 |
+36:27:13.2 |
HIP 25301 |
29.11 |
| 2026-04-10 12:00 |
05:26:50.34 |
+36:26:57.9 |
HIP 25301 |
29.38 |
| 2026-04-11 00:00 |
05:26:52.73 |
+36:26:42.7 |
HIP 25301 |
29.67 |
| 2026-04-11 12:00 |
05:26:55.16 |
+36:26:27.6 |
HIP 25301 |
29.98 |
| 2026-04-12 00:00 |
05:26:57.63 |
+36:26:12.5 |
HIP 25301 |
30.30 |
| 2026-04-12 12:00 |
05:27:00.13 |
+36:25:57.6 |
HIP 25301 |
30.63 |
| 2026-04-13 00:00 |
05:27:02.67 |
+36:25:42.7 |
HIP 25301 |
30.97 |
| 2026-04-13 12:00 |
05:27:05.24 |
+36:25:28.0 |
HIP 25301 |
31.33 |
| 2026-04-14 00:00 |
05:27:07.85 |
+36:25:13.3 |
HIP 25301 |
31.71 |
| 2026-04-14 12:00 |
05:27:10.50 |
+36:24:58.7 |
HIP 25593 |
31.93 |
| 2026-04-15 00:00 |
05:27:13.18 |
+36:24:44.2 |
HIP 25593 |
31.50 |
| 2026-04-15 12:00 |
05:27:15.89 |
+36:24:29.8 |
HIP 25593 |
31.08 |
| 2026-04-16 00:00 |
05:27:18.64 |
+36:24:15.5 |
HIP 25593 |
30.66 |