메타데이터
| 항목 |
값 |
| Designation |
C/2013 J3 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-02-22T21:02:36.003840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:35Z |
| Obs used |
105 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
14.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-07-03.0000000 |
| e |
0.99795766 |
| q (au) |
3.988692 |
| a (au) |
1952.998658 |
| i (deg) |
118.225398 |
| Ω (om, deg) |
200.757159 |
| ω (w, deg) |
320.958517 |
| M (ma, deg) |
0.001486 |
밝기
산란 + 전체 선형
$$
M_a = (5.562 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.562 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
06:53:52.39 |
+84:20:52.7 |
HIP 33466 |
20.02 |
| 2026-03-26 12:00 |
06:53:42.32 |
+84:19:56.5 |
HIP 33466 |
20.99 |
| 2026-03-27 00:00 |
06:53:32.69 |
+84:19:00.3 |
HIP 33466 |
21.95 |
| 2026-03-27 12:00 |
06:53:23.47 |
+84:18:04.1 |
HIP 33466 |
22.92 |
| 2026-03-28 00:00 |
06:53:14.68 |
+84:17:07.8 |
HIP 33466 |
23.88 |
| 2026-03-28 12:00 |
06:53:06.31 |
+84:16:11.4 |
HIP 33466 |
24.84 |
| 2026-03-29 00:00 |
06:52:58.35 |
+84:15:15.0 |
HIP 33466 |
25.80 |
| 2026-03-29 12:00 |
06:52:50.80 |
+84:14:18.6 |
HIP 32128 |
25.59 |
| 2026-03-30 00:00 |
06:52:43.65 |
+84:13:22.1 |
HIP 32128 |
24.76 |
| 2026-03-30 12:00 |
06:52:36.91 |
+84:12:25.6 |
HIP 32128 |
23.94 |
| 2026-03-31 00:00 |
06:52:30.57 |
+84:11:29.1 |
HIP 32128 |
23.13 |
| 2026-03-31 12:00 |
06:52:24.62 |
+84:10:32.6 |
HIP 32128 |
22.35 |
| 2026-04-01 00:00 |
06:52:19.06 |
+84:09:36.0 |
HIP 32128 |
21.58 |
| 2026-04-01 12:00 |
06:52:13.89 |
+84:08:39.5 |
HIP 32128 |
20.84 |
| 2026-04-02 00:00 |
06:52:09.11 |
+84:07:42.9 |
HIP 32128 |
20.12 |
| 2026-04-02 12:00 |
06:52:04.71 |
+84:06:46.3 |
HIP 32128 |
19.43 |
| 2026-04-03 00:00 |
06:52:00.69 |
+84:05:49.8 |
HIP 32128 |
18.77 |
| 2026-04-03 12:00 |
06:51:57.04 |
+84:04:53.2 |
HIP 32128 |
18.15 |
| 2026-04-04 00:00 |
06:51:53.76 |
+84:03:56.6 |
HIP 32128 |
17.55 |
| 2026-04-04 12:00 |
06:51:50.86 |
+84:03:00.1 |
HIP 32128 |
17.00 |
| 2026-04-05 00:00 |
06:51:48.31 |
+84:02:03.6 |
HIP 32128 |
16.50 |
| 2026-04-05 12:00 |
06:51:46.13 |
+84:01:07.1 |
HIP 32128 |
16.04 |
| 2026-04-06 00:00 |
06:51:44.31 |
+84:00:10.7 |
HIP 32128 |
15.63 |
| 2026-04-06 12:00 |
06:51:42.85 |
+83:59:14.2 |
HIP 32128 |
15.28 |
| 2026-04-07 00:00 |
06:51:41.73 |
+83:58:17.9 |
HIP 32128 |
14.99 |
| 2026-04-07 12:00 |
06:51:40.97 |
+83:57:21.5 |
HIP 32128 |
14.76 |
| 2026-04-08 00:00 |
06:51:40.55 |
+83:56:25.2 |
HIP 32128 |
14.60 |
| 2026-04-08 12:00 |
06:51:40.47 |
+83:55:29.0 |
HIP 32128 |
14.51 |
| 2026-04-09 00:00 |
06:51:40.74 |
+83:54:32.8 |
HIP 32128 |
14.49 |
| 2026-04-09 12:00 |
06:51:41.34 |
+83:53:36.6 |
HIP 32128 |
14.53 |
| 2026-04-10 00:00 |
06:51:42.27 |
+83:52:40.5 |
HIP 32128 |
14.65 |
| 2026-04-10 12:00 |
06:51:43.54 |
+83:51:44.5 |
HIP 32128 |
14.83 |
| 2026-04-11 00:00 |
06:51:45.13 |
+83:50:48.6 |
HIP 32128 |
15.07 |
| 2026-04-11 12:00 |
06:51:47.05 |
+83:49:52.7 |
HIP 32128 |
15.38 |
| 2026-04-12 00:00 |
06:51:49.29 |
+83:48:56.9 |
HIP 32128 |
15.74 |
| 2026-04-12 12:00 |
06:51:51.84 |
+83:48:01.2 |
HIP 32128 |
16.16 |
| 2026-04-13 00:00 |
06:51:54.72 |
+83:47:05.5 |
HIP 32128 |
16.63 |
| 2026-04-13 12:00 |
06:51:57.90 |
+83:46:10.0 |
HIP 32128 |
17.14 |
| 2026-04-14 00:00 |
06:52:01.40 |
+83:45:14.5 |
HIP 32128 |
17.69 |
| 2026-04-14 12:00 |
06:52:05.20 |
+83:44:19.2 |
HIP 32128 |
18.28 |
| 2026-04-15 00:00 |
06:52:09.30 |
+83:43:23.9 |
HIP 32128 |
18.90 |
| 2026-04-15 12:00 |
06:52:13.71 |
+83:42:28.7 |
HIP 32128 |
19.55 |
| 2026-04-16 00:00 |
06:52:18.42 |
+83:41:33.7 |
HIP 32128 |
20.23 |