메타데이터
| 항목 |
값 |
| Designation |
C/1995 Q2 (Hartley-Drinkwater) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1995-08-02T17:27:23.549760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
22.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1995-09-06.0000000 |
| e |
0.96649288 |
| q (au) |
1.889143 |
| a (au) |
56.380355 |
| i (deg) |
168.007513 |
| Ω (om, deg) |
300.750783 |
| ω (w, deg) |
314.000279 |
| M (ma, deg) |
0.079792 |
밝기
산란 + 전체 선형
$$
M_a = (13.337 + 4.533\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.337 |
| n |
4.533 |
| gf |
0.995 |
| gb |
-0.557 |
| k |
0.869 |
| δ90 |
9.997 |
| 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) |
| 2026-05-12 00:00 |
12:27:50.66 |
+08:48:48.8 |
HIP 60815 |
5.16 |
| 2026-05-12 12:00 |
12:27:48.87 |
+08:48:54.6 |
HIP 60815 |
5.15 |
| 2026-05-13 00:00 |
12:27:47.09 |
+08:49:00.3 |
HIP 60815 |
5.17 |
| 2026-05-13 12:00 |
12:27:45.33 |
+08:49:05.8 |
HIP 60815 |
5.24 |
| 2026-05-14 00:00 |
12:27:43.59 |
+08:49:11.2 |
HIP 60815 |
5.35 |
| 2026-05-14 12:00 |
12:27:41.86 |
+08:49:16.5 |
HIP 60815 |
5.49 |
| 2026-05-15 00:00 |
12:27:40.14 |
+08:49:21.6 |
HIP 60815 |
5.65 |
| 2026-05-15 12:00 |
12:27:38.44 |
+08:49:26.6 |
HIP 60815 |
5.85 |
| 2026-05-16 00:00 |
12:27:36.75 |
+08:49:31.4 |
HIP 60815 |
6.07 |
| 2026-05-16 12:00 |
12:27:35.08 |
+08:49:36.2 |
HIP 60815 |
6.30 |
| 2026-05-17 00:00 |
12:27:33.42 |
+08:49:40.7 |
HIP 60815 |
6.56 |
| 2026-05-17 12:00 |
12:27:31.78 |
+08:49:45.2 |
HIP 60815 |
6.83 |
| 2026-05-18 00:00 |
12:27:30.16 |
+08:49:49.5 |
HIP 60815 |
7.11 |
| 2026-05-18 12:00 |
12:27:28.55 |
+08:49:53.7 |
HIP 60815 |
7.40 |
| 2026-05-19 00:00 |
12:27:26.95 |
+08:49:57.7 |
HIP 60815 |
7.70 |
| 2026-05-19 12:00 |
12:27:25.37 |
+08:50:01.6 |
HIP 60815 |
8.00 |
| 2026-05-20 00:00 |
12:27:23.81 |
+08:50:05.3 |
HIP 60815 |
8.31 |
| 2026-05-20 12:00 |
12:27:22.26 |
+08:50:08.9 |
HIP 60815 |
8.63 |
| 2026-05-21 00:00 |
12:27:20.73 |
+08:50:12.4 |
HIP 60815 |
8.95 |
| 2026-05-21 12:00 |
12:27:19.21 |
+08:50:15.7 |
HIP 60754 |
8.84 |
| 2026-05-22 00:00 |
12:27:17.72 |
+08:50:18.9 |
HIP 60754 |
8.63 |
| 2026-05-22 12:00 |
12:27:16.23 |
+08:50:22.0 |
HIP 60754 |
8.43 |
| 2026-05-23 00:00 |
12:27:14.77 |
+08:50:24.9 |
HIP 60754 |
8.25 |
| 2026-05-23 12:00 |
12:27:13.32 |
+08:50:27.7 |
HIP 60754 |
8.09 |
| 2026-05-24 00:00 |
12:27:11.88 |
+08:50:30.4 |
HIP 60754 |
7.95 |
| 2026-05-24 12:00 |
12:27:10.46 |
+08:50:32.9 |
HIP 60754 |
7.82 |
| 2026-05-25 00:00 |
12:27:09.06 |
+08:50:35.2 |
HIP 60754 |
7.70 |
| 2026-05-25 12:00 |
12:27:07.68 |
+08:50:37.5 |
HIP 60754 |
7.61 |
| 2026-05-26 00:00 |
12:27:06.31 |
+08:50:39.6 |
HIP 60754 |
7.53 |
| 2026-05-26 12:00 |
12:27:04.96 |
+08:50:41.5 |
HIP 60754 |
7.47 |
| 2026-05-27 00:00 |
12:27:03.63 |
+08:50:43.3 |
HIP 60754 |
7.42 |
| 2026-05-27 12:00 |
12:27:02.31 |
+08:50:45.0 |
HIP 60754 |
7.40 |
| 2026-05-28 00:00 |
12:27:01.01 |
+08:50:46.6 |
HIP 60754 |
7.39 |
| 2026-05-28 12:00 |
12:26:59.73 |
+08:50:48.0 |
HIP 60754 |
7.39 |
| 2026-05-29 00:00 |
12:26:58.47 |
+08:50:49.2 |
HIP 60754 |
7.41 |
| 2026-05-29 12:00 |
12:26:57.22 |
+08:50:50.4 |
HIP 60754 |
7.45 |
| 2026-05-30 00:00 |
12:26:55.99 |
+08:50:51.4 |
HIP 60754 |
7.49 |
| 2026-05-30 12:00 |
12:26:54.78 |
+08:50:52.2 |
HIP 60754 |
7.56 |
| 2026-05-31 00:00 |
12:26:53.58 |
+08:50:53.0 |
HIP 60754 |
7.63 |
| 2026-05-31 12:00 |
12:26:52.40 |
+08:50:53.5 |
HIP 60754 |
7.71 |
| 2026-06-01 00:00 |
12:26:51.24 |
+08:50:54.0 |
HIP 60754 |
7.81 |
| 2026-06-01 12:00 |
12:26:50.10 |
+08:50:54.3 |
HIP 60754 |
7.91 |
| 2026-06-02 00:00 |
12:26:48.98 |
+08:50:54.5 |
HIP 60754 |
8.03 |