메타데이터
| 항목 |
값 |
| Designation |
308P/Lagerkvist-Carsenty |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-05-13T16:53:46.351680Z |
| Orbit solution date (soln_date, UTC) |
2024-10-10T19:55:49Z |
| Obs used |
369 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2014-08-16T04:49:51.110400Z |
| Discovery magnitude (MPC) |
20.70 i |
| Discovery observatory (MPC) |
W84 · Cerro Tololo-DECam |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-05-13.0000000 |
| e |
0.36222272 |
| q (au) |
4.256979 |
| a (au) |
6.674710 |
| i (deg) |
4.840175 |
| Ω (om, deg) |
63.143956 |
| ω (w, deg) |
333.650183 |
| M (ma, deg) |
192.952390 |
밝기
산란 + 전체 선형
$$
M_a = (9.986 + 3.995\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.986 |
| n |
3.995 |
| gf |
0.999 |
| gb |
-0.962 |
| 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) |
| 2026-07-29 00:00 |
15:55:02.50 |
-20:43:52.0 |
HIP 77948 |
3.69 |
| 2026-07-29 12:00 |
15:55:00.28 |
-20:43:49.7 |
HIP 77948 |
3.81 |
| 2026-07-30 00:00 |
15:54:58.17 |
-20:43:47.7 |
HIP 77948 |
3.99 |
| 2026-07-30 12:00 |
15:54:56.19 |
-20:43:46.0 |
HIP 77948 |
4.19 |
| 2026-07-31 00:00 |
15:54:54.33 |
-20:43:44.7 |
HIP 77948 |
4.42 |
| 2026-07-31 12:00 |
15:54:52.60 |
-20:43:43.8 |
HIP 77948 |
4.65 |
| 2026-08-01 00:00 |
15:54:50.98 |
-20:43:43.2 |
HIP 77948 |
4.88 |
| 2026-08-01 12:00 |
15:54:49.49 |
-20:43:42.9 |
HIP 77948 |
5.11 |
| 2026-08-02 00:00 |
15:54:48.13 |
-20:43:43.0 |
HIP 77948 |
5.32 |
| 2026-08-02 12:00 |
15:54:46.88 |
-20:43:43.4 |
HIP 77948 |
5.53 |
| 2026-08-03 00:00 |
15:54:45.76 |
-20:43:44.2 |
HIP 77948 |
5.71 |
| 2026-08-03 12:00 |
15:54:44.76 |
-20:43:45.4 |
HIP 77948 |
5.87 |
| 2026-08-04 00:00 |
15:54:43.88 |
-20:43:46.9 |
HIP 77948 |
6.01 |
| 2026-08-04 12:00 |
15:54:43.13 |
-20:43:48.8 |
HIP 77948 |
6.13 |
| 2026-08-05 00:00 |
15:54:42.50 |
-20:43:51.0 |
HIP 77948 |
6.23 |
| 2026-08-05 12:00 |
15:54:42.00 |
-20:43:53.5 |
HIP 77948 |
6.30 |
| 2026-08-06 00:00 |
15:54:41.61 |
-20:43:56.5 |
HIP 77948 |
6.35 |
| 2026-08-06 12:00 |
15:54:41.36 |
-20:43:59.7 |
HIP 77948 |
6.36 |
| 2026-08-07 00:00 |
15:54:41.22 |
-20:44:03.4 |
HIP 77948 |
6.36 |
| 2026-08-07 12:00 |
15:54:41.21 |
-20:44:07.4 |
HIP 77948 |
6.32 |
| 2026-08-08 00:00 |
15:54:41.32 |
-20:44:11.7 |
HIP 77948 |
6.26 |
| 2026-08-08 12:00 |
15:54:41.56 |
-20:44:16.4 |
HIP 77948 |
6.17 |
| 2026-08-09 00:00 |
15:54:41.92 |
-20:44:21.5 |
HIP 77948 |
6.06 |
| 2026-08-09 12:00 |
15:54:42.41 |
-20:44:26.9 |
HIP 77948 |
5.91 |
| 2026-08-10 00:00 |
15:54:43.02 |
-20:44:32.7 |
HIP 77948 |
5.74 |
| 2026-08-10 12:00 |
15:54:43.76 |
-20:44:38.9 |
HIP 77948 |
5.54 |
| 2026-08-11 00:00 |
15:54:44.61 |
-20:44:45.4 |
HIP 77948 |
5.31 |
| 2026-08-11 12:00 |
15:54:45.60 |
-20:44:52.2 |
HIP 77948 |
5.06 |
| 2026-08-12 00:00 |
15:54:46.71 |
-20:44:59.5 |
HIP 77948 |
4.77 |
| 2026-08-12 12:00 |
15:54:47.94 |
-20:45:07.1 |
HIP 77948 |
4.46 |
| 2026-08-13 00:00 |
15:54:49.29 |
-20:45:15.0 |
HIP 77948 |
4.12 |
| 2026-08-13 12:00 |
15:54:50.77 |
-20:45:23.3 |
HIP 77948 |
3.76 |
| 2026-08-14 00:00 |
15:54:52.38 |
-20:45:31.9 |
HIP 77948 |
3.37 |
| 2026-08-14 12:00 |
15:54:54.11 |
-20:45:40.9 |
HIP 77948 |
2.96 |
| 2026-08-15 00:00 |
15:54:55.96 |
-20:45:50.3 |
HIP 77948 |
2.53 |
| 2026-08-15 12:00 |
15:54:57.93 |
-20:46:00.0 |
HIP 77948 |
2.09 |
| 2026-08-16 00:00 |
15:55:00.03 |
-20:46:10.1 |
HIP 77948 |
1.65 |
| 2026-08-16 12:00 |
15:55:02.26 |
-20:46:20.5 |
HIP 77948 |
1.27 |
| 2026-08-17 00:00 |
15:55:04.60 |
-20:46:31.3 |
HIP 77948 |
1.03 |
| 2026-08-17 12:00 |
15:55:07.07 |
-20:46:42.4 |
HIP 77948 |
1.11 |
| 2026-08-18 00:00 |
15:55:09.66 |
-20:46:53.9 |
HIP 77948 |
1.48 |
| 2026-08-18 12:00 |
15:55:12.37 |
-20:47:05.7 |
HIP 77948 |
2.02 |
| 2026-08-19 00:00 |
15:55:15.20 |
-20:47:17.9 |
HIP 77948 |
2.64 |