메타데이터
| 항목 |
값 |
| Designation |
C/1999 K7 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-02-24T18:38:47.711040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1999-06-03.0000000 |
| e |
0.99652152 |
| q (au) |
2.322718 |
| a (au) |
667.740065 |
| i (deg) |
135.158550 |
| Ω (om, deg) |
50.330978 |
| ω (w, deg) |
104.660079 |
| M (ma, deg) |
0.005611 |
밝기
산란 + 전체 선형
$$
M_a = (14.412 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.412 |
| n |
2.000 |
| gf |
0.999 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
09:13:27.06 |
-31:22:17.9 |
HIP 45198 |
14.11 |
| 2026-03-26 12:00 |
09:13:25.09 |
-31:21:51.7 |
HIP 45198 |
14.11 |
| 2026-03-27 00:00 |
09:13:23.13 |
-31:21:25.4 |
HIP 45251 |
13.89 |
| 2026-03-27 12:00 |
09:13:21.20 |
-31:20:59.1 |
HIP 45251 |
13.45 |
| 2026-03-28 00:00 |
09:13:19.28 |
-31:20:32.6 |
HIP 45251 |
13.03 |
| 2026-03-28 12:00 |
09:13:17.38 |
-31:20:06.0 |
HIP 45251 |
12.61 |
| 2026-03-29 00:00 |
09:13:15.51 |
-31:19:39.4 |
HIP 45251 |
12.21 |
| 2026-03-29 12:00 |
09:13:13.65 |
-31:19:12.7 |
HIP 45251 |
11.82 |
| 2026-03-30 00:00 |
09:13:11.81 |
-31:18:45.8 |
HIP 45251 |
11.45 |
| 2026-03-30 12:00 |
09:13:09.99 |
-31:18:18.9 |
HIP 45251 |
11.10 |
| 2026-03-31 00:00 |
09:13:08.20 |
-31:17:51.9 |
HIP 45251 |
10.77 |
| 2026-03-31 12:00 |
09:13:06.42 |
-31:17:24.9 |
HIP 45251 |
10.45 |
| 2026-04-01 00:00 |
09:13:04.66 |
-31:16:57.7 |
HIP 45251 |
10.16 |
| 2026-04-01 12:00 |
09:13:02.93 |
-31:16:30.5 |
HIP 45251 |
9.89 |
| 2026-04-02 00:00 |
09:13:01.21 |
-31:16:03.2 |
HIP 45251 |
9.64 |
| 2026-04-02 12:00 |
09:12:59.51 |
-31:15:35.8 |
HIP 45251 |
9.43 |
| 2026-04-03 00:00 |
09:12:57.84 |
-31:15:08.4 |
HIP 45251 |
9.24 |
| 2026-04-03 12:00 |
09:12:56.18 |
-31:14:40.9 |
HIP 45251 |
9.08 |
| 2026-04-04 00:00 |
09:12:54.55 |
-31:14:13.3 |
HIP 45251 |
8.95 |
| 2026-04-04 12:00 |
09:12:52.93 |
-31:13:45.6 |
HIP 45251 |
8.85 |
| 2026-04-05 00:00 |
09:12:51.34 |
-31:13:17.9 |
HIP 45251 |
8.78 |
| 2026-04-05 12:00 |
09:12:49.77 |
-31:12:50.1 |
HIP 45251 |
8.75 |
| 2026-04-06 00:00 |
09:12:48.22 |
-31:12:22.3 |
HIP 45220 |
8.58 |
| 2026-04-06 12:00 |
09:12:46.69 |
-31:11:54.4 |
HIP 45220 |
8.20 |
| 2026-04-07 00:00 |
09:12:45.18 |
-31:11:26.5 |
HIP 45220 |
7.84 |
| 2026-04-07 12:00 |
09:12:43.70 |
-31:10:58.5 |
HIP 45220 |
7.50 |
| 2026-04-08 00:00 |
09:12:42.23 |
-31:10:30.4 |
HIP 45220 |
7.19 |
| 2026-04-08 12:00 |
09:12:40.79 |
-31:10:02.3 |
HIP 45220 |
6.91 |
| 2026-04-09 00:00 |
09:12:39.37 |
-31:09:34.2 |
HIP 45220 |
6.66 |
| 2026-04-09 12:00 |
09:12:37.97 |
-31:09:06.0 |
HIP 45220 |
6.45 |
| 2026-04-10 00:00 |
09:12:36.59 |
-31:08:37.8 |
HIP 45220 |
6.27 |
| 2026-04-10 12:00 |
09:12:35.23 |
-31:08:09.5 |
HIP 45220 |
6.14 |
| 2026-04-11 00:00 |
09:12:33.90 |
-31:07:41.2 |
HIP 45220 |
6.05 |
| 2026-04-11 12:00 |
09:12:32.58 |
-31:07:12.9 |
HIP 45220 |
6.00 |
| 2026-04-12 00:00 |
09:12:31.29 |
-31:06:44.5 |
HIP 45220 |
6.01 |
| 2026-04-12 12:00 |
09:12:30.03 |
-31:06:16.1 |
HIP 45220 |
6.05 |
| 2026-04-13 00:00 |
09:12:28.78 |
-31:05:47.7 |
HIP 45220 |
6.14 |
| 2026-04-13 12:00 |
09:12:27.56 |
-31:05:19.2 |
HIP 45220 |
6.28 |
| 2026-04-14 00:00 |
09:12:26.36 |
-31:04:50.7 |
HIP 45220 |
6.45 |
| 2026-04-14 12:00 |
09:12:25.18 |
-31:04:22.2 |
HIP 45220 |
6.65 |
| 2026-04-15 00:00 |
09:12:24.02 |
-31:03:53.7 |
HIP 45220 |
6.89 |
| 2026-04-15 12:00 |
09:12:22.89 |
-31:03:25.1 |
HIP 45220 |
7.15 |
| 2026-04-16 00:00 |
09:12:21.78 |
-31:02:56.6 |
HIP 45220 |
7.44 |