메타데이터
| 항목 |
값 |
| Designation |
C/2012 K5 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-11-28T16:30:24.831360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:09Z |
| Obs used |
4281 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
5.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-10-15.0000000 |
| e |
0.99852650 |
| q (au) |
1.141811 |
| a (au) |
774.896185 |
| i (deg) |
92.848025 |
| Ω (om, deg) |
279.039021 |
| ω (w, deg) |
139.289759 |
| M (ma, deg) |
359.997958 |
밝기
산란 + 전체 선형
$$
M_a = (12.248 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.248 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2012-05-06 |
2012-08-18 |
+8.9448 |
-3.462 |
| 2012-08-18 |
2012-11-25 |
+1.6210 |
-1.548 |
| 2012-11-29 |
2013-04-14 |
+6.6103 |
-0.571 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
23:13:02.44 |
-82:25:08.5 |
HIP 113807 |
26.40 |
| 2026-06-01 12:00 |
23:13:04.27 |
-82:26:03.1 |
HIP 113807 |
25.84 |
| 2026-06-02 00:00 |
23:13:05.89 |
-82:26:57.7 |
HIP 113807 |
25.30 |
| 2026-06-02 12:00 |
23:13:07.29 |
-82:27:52.4 |
HIP 113807 |
24.77 |
| 2026-06-03 00:00 |
23:13:08.46 |
-82:28:47.2 |
HIP 113807 |
24.26 |
| 2026-06-03 12:00 |
23:13:09.41 |
-82:29:42.1 |
HIP 113807 |
23.76 |
| 2026-06-04 00:00 |
23:13:10.14 |
-82:30:37.1 |
HIP 113807 |
23.28 |
| 2026-06-04 12:00 |
23:13:10.63 |
-82:31:32.1 |
HIP 113807 |
22.83 |
| 2026-06-05 00:00 |
23:13:10.90 |
-82:32:27.3 |
HIP 113807 |
22.39 |
| 2026-06-05 12:00 |
23:13:10.94 |
-82:33:22.4 |
HIP 113807 |
21.98 |
| 2026-06-06 00:00 |
23:13:10.75 |
-82:34:17.7 |
HIP 113807 |
21.59 |
| 2026-06-06 12:00 |
23:13:10.32 |
-82:35:13.0 |
HIP 113807 |
21.22 |
| 2026-06-07 00:00 |
23:13:09.66 |
-82:36:08.4 |
HIP 113807 |
20.89 |
| 2026-06-07 12:00 |
23:13:08.76 |
-82:37:03.8 |
HIP 113807 |
20.58 |
| 2026-06-08 00:00 |
23:13:07.63 |
-82:37:59.3 |
HIP 113807 |
20.30 |
| 2026-06-08 12:00 |
23:13:06.25 |
-82:38:54.9 |
HIP 113807 |
20.05 |
| 2026-06-09 00:00 |
23:13:04.64 |
-82:39:50.4 |
HIP 113807 |
19.84 |
| 2026-06-09 12:00 |
23:13:02.78 |
-82:40:46.0 |
HIP 113807 |
19.66 |
| 2026-06-10 00:00 |
23:13:00.67 |
-82:41:41.7 |
HIP 113807 |
19.51 |
| 2026-06-10 12:00 |
23:12:58.32 |
-82:42:37.4 |
HIP 113807 |
19.40 |
| 2026-06-11 00:00 |
23:12:55.73 |
-82:43:33.0 |
HIP 113807 |
19.33 |
| 2026-06-11 12:00 |
23:12:52.88 |
-82:44:28.8 |
HIP 113807 |
19.29 |
| 2026-06-12 00:00 |
23:12:49.78 |
-82:45:24.5 |
HIP 113807 |
19.29 |
| 2026-06-12 12:00 |
23:12:46.43 |
-82:46:20.2 |
HIP 113807 |
19.33 |
| 2026-06-13 00:00 |
23:12:42.82 |
-82:47:16.0 |
HIP 113807 |
19.41 |
| 2026-06-13 12:00 |
23:12:38.96 |
-82:48:11.7 |
HIP 113807 |
19.52 |
| 2026-06-14 00:00 |
23:12:34.84 |
-82:49:07.5 |
HIP 113807 |
19.68 |
| 2026-06-14 12:00 |
23:12:30.47 |
-82:50:03.2 |
HIP 113807 |
19.86 |
| 2026-06-15 00:00 |
23:12:25.83 |
-82:50:58.9 |
HIP 113807 |
20.09 |
| 2026-06-15 12:00 |
23:12:20.93 |
-82:51:54.6 |
HIP 113807 |
20.34 |
| 2026-06-16 00:00 |
23:12:15.77 |
-82:52:50.3 |
HIP 113807 |
20.63 |
| 2026-06-16 12:00 |
23:12:10.35 |
-82:53:45.9 |
HIP 113807 |
20.96 |
| 2026-06-17 00:00 |
23:12:04.65 |
-82:54:41.5 |
HIP 113807 |
21.31 |
| 2026-06-17 12:00 |
23:11:58.70 |
-82:55:37.1 |
HIP 113807 |
21.69 |
| 2026-06-18 00:00 |
23:11:52.47 |
-82:56:32.6 |
HIP 113807 |
22.10 |
| 2026-06-18 12:00 |
23:11:45.97 |
-82:57:28.1 |
HIP 113807 |
22.53 |
| 2026-06-19 00:00 |
23:11:39.21 |
-82:58:23.5 |
HIP 113807 |
22.99 |
| 2026-06-19 12:00 |
23:11:32.17 |
-82:59:18.9 |
HIP 113807 |
23.47 |
| 2026-06-20 00:00 |
23:11:24.86 |
-83:00:14.2 |
HIP 113807 |
23.98 |
| 2026-06-20 12:00 |
23:11:17.28 |
-83:01:09.4 |
HIP 113807 |
24.50 |
| 2026-06-21 00:00 |
23:11:09.42 |
-83:02:04.5 |
HIP 113807 |
25.05 |
| 2026-06-21 12:00 |
23:11:01.29 |
-83:02:59.6 |
HIP 113807 |
25.61 |
| 2026-06-22 00:00 |
23:10:52.88 |
-83:03:54.6 |
HIP 113807 |
26.19 |