메타데이터
| 항목 |
값 |
| Designation |
C/2012 K6 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-05-21T11:03:28.212480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:10Z |
| Obs used |
1091 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
7.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-12-31.0000000 |
| e |
0.99919878 |
| q (au) |
3.353032 |
| a (au) |
4184.883889 |
| i (deg) |
135.215103 |
| Ω (om, deg) |
206.898541 |
| ω (w, deg) |
338.826785 |
| M (ma, deg) |
0.000814 |
밝기
산란 + 전체 선형
$$
M_a = (8.021 + 3.183\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.021 |
| n |
3.183 |
| gf |
0.997 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.993 |
| 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 |
| 2012-04-20 |
2013-05-20 |
+12.1573 |
-6.871 |
| 2013-06-02 |
2014-01-30 |
-1.7355 |
+0.738 |
| 2014-01-30 |
2015-04-09 |
-2.5207 |
+1.571 |
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 |
05:04:28.96 |
+61:11:06.3 |
HIP 23766 |
14.57 |
| 2026-09-20 12:00 |
05:04:26.64 |
+61:11:40.3 |
HIP 23766 |
14.90 |
| 2026-09-21 00:00 |
05:04:24.25 |
+61:12:14.1 |
HIP 23766 |
15.25 |
| 2026-09-21 12:00 |
05:04:21.79 |
+61:12:47.9 |
HIP 23766 |
15.62 |
| 2026-09-22 00:00 |
05:04:19.25 |
+61:13:21.6 |
HIP 23766 |
16.02 |
| 2026-09-22 12:00 |
05:04:16.63 |
+61:13:55.2 |
HIP 23766 |
16.45 |
| 2026-09-23 00:00 |
05:04:13.95 |
+61:14:28.7 |
HIP 23766 |
16.89 |
| 2026-09-23 12:00 |
05:04:11.19 |
+61:15:02.0 |
HIP 23766 |
17.36 |
| 2026-09-24 00:00 |
05:04:08.35 |
+61:15:35.3 |
HIP 23766 |
17.84 |
| 2026-09-24 12:00 |
05:04:05.44 |
+61:16:08.5 |
HIP 23766 |
18.35 |
| 2026-09-25 00:00 |
05:04:02.46 |
+61:16:41.5 |
HIP 23766 |
18.87 |
| 2026-09-25 12:00 |
05:03:59.40 |
+61:17:14.5 |
HIP 23766 |
19.40 |
| 2026-09-26 00:00 |
05:03:56.27 |
+61:17:47.3 |
HIP 23766 |
19.95 |
| 2026-09-26 12:00 |
05:03:53.07 |
+61:18:20.0 |
HIP 23766 |
20.52 |
| 2026-09-27 00:00 |
05:03:49.80 |
+61:18:52.6 |
HIP 23766 |
21.10 |
| 2026-09-27 12:00 |
05:03:46.45 |
+61:19:25.0 |
HIP 23380 |
21.52 |
| 2026-09-28 00:00 |
05:03:43.02 |
+61:19:57.3 |
HIP 23380 |
21.60 |
| 2026-09-28 12:00 |
05:03:39.53 |
+61:20:29.5 |
HIP 23380 |
21.69 |
| 2026-09-29 00:00 |
05:03:35.96 |
+61:21:01.6 |
HIP 23380 |
21.79 |
| 2026-09-29 12:00 |
05:03:32.31 |
+61:21:33.5 |
HIP 23380 |
21.91 |
| 2026-09-30 00:00 |
05:03:28.60 |
+61:22:05.2 |
HIP 23380 |
22.04 |
| 2026-09-30 12:00 |
05:03:24.81 |
+61:22:36.9 |
HIP 23380 |
22.18 |
| 2026-10-01 00:00 |
05:03:20.95 |
+61:23:08.3 |
HIP 23380 |
22.34 |
| 2026-10-01 12:00 |
05:03:17.02 |
+61:23:39.7 |
HIP 23380 |
22.51 |
| 2026-10-02 00:00 |
05:03:13.01 |
+61:24:10.8 |
HIP 23380 |
22.70 |
| 2026-10-02 12:00 |
05:03:08.93 |
+61:24:41.8 |
HIP 23380 |
22.90 |
| 2026-10-03 00:00 |
05:03:04.78 |
+61:25:12.7 |
HIP 23380 |
23.12 |
| 2026-10-03 12:00 |
05:03:00.55 |
+61:25:43.4 |
HIP 23380 |
23.35 |
| 2026-10-04 00:00 |
05:02:56.26 |
+61:26:13.9 |
HIP 23380 |
23.59 |
| 2026-10-04 12:00 |
05:02:51.89 |
+61:26:44.3 |
HIP 23380 |
23.84 |
| 2026-10-05 00:00 |
05:02:47.45 |
+61:27:14.4 |
HIP 23317 |
24.11 |
| 2026-10-05 12:00 |
05:02:42.93 |
+61:27:44.4 |
HIP 23317 |
24.22 |
| 2026-10-06 00:00 |
05:02:38.35 |
+61:28:14.3 |
HIP 23317 |
24.34 |
| 2026-10-06 12:00 |
05:02:33.69 |
+61:28:43.9 |
HIP 23317 |
24.48 |
| 2026-10-07 00:00 |
05:02:28.96 |
+61:29:13.4 |
HIP 23317 |
24.63 |
| 2026-10-07 12:00 |
05:02:24.16 |
+61:29:42.6 |
HIP 23317 |
24.80 |
| 2026-10-08 00:00 |
05:02:19.29 |
+61:30:11.7 |
HIP 23317 |
24.98 |
| 2026-10-08 12:00 |
05:02:14.35 |
+61:30:40.6 |
HIP 23317 |
25.18 |
| 2026-10-09 00:00 |
05:02:09.34 |
+61:31:09.3 |
HIP 23317 |
25.39 |
| 2026-10-09 12:00 |
05:02:04.26 |
+61:31:37.7 |
HIP 23317 |
25.62 |
| 2026-10-10 00:00 |
05:01:59.11 |
+61:32:06.0 |
HIP 23317 |
25.87 |
| 2026-10-10 12:00 |
05:01:53.89 |
+61:32:34.1 |
HIP 23317 |
26.13 |
| 2026-10-11 00:00 |
05:01:48.60 |
+61:33:01.9 |
HIP 23317 |
26.40 |