메타데이터
| 항목 |
값 |
| Designation |
C/2012 C1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-02-04T12:32:23.248320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:00Z |
| Obs used |
219 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
11.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-11-05.0000000 |
| e |
0.99620583 |
| q (au) |
4.837975 |
| a (au) |
1275.108361 |
| i (deg) |
96.277709 |
| Ω (om, deg) |
300.639926 |
| ω (w, deg) |
279.889151 |
| M (ma, deg) |
359.998019 |
밝기
산란 + 전체 선형
$$
M_a = (2.686 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.686 |
| n |
6.000 |
| gf |
0.949 |
| gb |
-0.999 |
| k |
1.000 |
| δ90 |
9.714 |
| 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) |
| 2026-07-29 00:00 |
19:02:35.80 |
+29:40:46.4 |
HIP 93397 |
19.22 |
| 2026-07-29 12:00 |
19:02:31.06 |
+29:40:30.0 |
HIP 93397 |
18.19 |
| 2026-07-30 00:00 |
19:02:26.33 |
+29:40:13.3 |
HIP 93397 |
17.17 |
| 2026-07-30 12:00 |
19:02:21.61 |
+29:39:56.1 |
HIP 93397 |
16.15 |
| 2026-07-31 00:00 |
19:02:16.92 |
+29:39:38.5 |
HIP 93397 |
15.14 |
| 2026-07-31 12:00 |
19:02:12.24 |
+29:39:20.6 |
HIP 93397 |
14.14 |
| 2026-08-01 00:00 |
19:02:07.58 |
+29:39:02.3 |
HIP 93397 |
13.14 |
| 2026-08-01 12:00 |
19:02:02.94 |
+29:38:43.6 |
HIP 93397 |
12.15 |
| 2026-08-02 00:00 |
19:01:58.32 |
+29:38:24.5 |
HIP 93397 |
11.17 |
| 2026-08-02 12:00 |
19:01:53.72 |
+29:38:05.0 |
HIP 93397 |
10.21 |
| 2026-08-03 00:00 |
19:01:49.14 |
+29:37:45.2 |
HIP 93397 |
9.27 |
| 2026-08-03 12:00 |
19:01:44.58 |
+29:37:25.0 |
HIP 93397 |
8.35 |
| 2026-08-04 00:00 |
19:01:40.03 |
+29:37:04.4 |
HIP 93397 |
7.45 |
| 2026-08-04 12:00 |
19:01:35.51 |
+29:36:43.4 |
HIP 93397 |
6.61 |
| 2026-08-05 00:00 |
19:01:31.01 |
+29:36:22.1 |
HIP 93397 |
5.82 |
| 2026-08-05 12:00 |
19:01:26.53 |
+29:36:00.4 |
HIP 93397 |
5.12 |
| 2026-08-06 00:00 |
19:01:22.07 |
+29:35:38.3 |
HIP 93397 |
4.54 |
| 2026-08-06 12:00 |
19:01:17.64 |
+29:35:15.9 |
HIP 93397 |
4.15 |
| 2026-08-07 00:00 |
19:01:13.22 |
+29:34:53.1 |
HIP 93397 |
3.98 |
| 2026-08-07 12:00 |
19:01:08.83 |
+29:34:29.9 |
HIP 93397 |
4.06 |
| 2026-08-08 00:00 |
19:01:04.46 |
+29:34:06.4 |
HIP 93397 |
4.39 |
| 2026-08-08 12:00 |
19:01:00.12 |
+29:33:42.5 |
HIP 93397 |
4.91 |
| 2026-08-09 00:00 |
19:00:55.79 |
+29:33:18.3 |
HIP 93397 |
5.56 |
| 2026-08-09 12:00 |
19:00:51.50 |
+29:32:53.7 |
HIP 93397 |
6.30 |
| 2026-08-10 00:00 |
19:00:47.22 |
+29:32:28.8 |
HIP 93397 |
7.11 |
| 2026-08-10 12:00 |
19:00:42.97 |
+29:32:03.5 |
HIP 93397 |
7.96 |
| 2026-08-11 00:00 |
19:00:38.75 |
+29:31:37.9 |
HIP 93397 |
8.84 |
| 2026-08-11 12:00 |
19:00:34.55 |
+29:31:11.9 |
HIP 93397 |
9.74 |
| 2026-08-12 00:00 |
19:00:30.38 |
+29:30:45.6 |
HIP 93397 |
10.65 |
| 2026-08-12 12:00 |
19:00:26.23 |
+29:30:19.0 |
HIP 93397 |
11.58 |
| 2026-08-13 00:00 |
19:00:22.11 |
+29:29:52.0 |
HIP 93397 |
12.51 |
| 2026-08-13 12:00 |
19:00:18.02 |
+29:29:24.7 |
HIP 93397 |
13.45 |
| 2026-08-14 00:00 |
19:00:13.95 |
+29:28:57.1 |
HIP 93397 |
14.39 |
| 2026-08-14 12:00 |
19:00:09.91 |
+29:28:29.2 |
HIP 93397 |
15.33 |
| 2026-08-15 00:00 |
19:00:05.90 |
+29:28:00.9 |
HIP 93397 |
16.28 |
| 2026-08-15 12:00 |
19:00:01.91 |
+29:27:32.4 |
HIP 93397 |
17.22 |
| 2026-08-16 00:00 |
18:59:57.96 |
+29:27:03.5 |
HIP 93397 |
18.17 |
| 2026-08-16 12:00 |
18:59:54.03 |
+29:26:34.3 |
HIP 93397 |
19.11 |
| 2026-08-17 00:00 |
18:59:50.13 |
+29:26:04.8 |
HIP 93301 |
19.27 |
| 2026-08-17 12:00 |
18:59:46.26 |
+29:25:34.9 |
HIP 93301 |
19.06 |
| 2026-08-18 00:00 |
18:59:42.42 |
+29:25:04.8 |
HIP 93301 |
18.88 |
| 2026-08-18 12:00 |
18:59:38.61 |
+29:24:34.4 |
HIP 93301 |
18.75 |
| 2026-08-19 00:00 |
18:59:34.82 |
+29:24:03.7 |
HIP 93301 |
18.66 |